high frequencyn.adj.

Brit.

/ˌhʌɪ ˈfriːkw(ə)nsi/, U.S.

/ˌhaɪ ˈfrikwənsi/

Origin: Formed within English, by compounding. Etymons: high adj., frequency n.

Etymology: < high adj. + frequency n.

A. n.

1. A high rate of occurrence of any regularly repeated event, so that the interval between successive events is correspondingly small; (Physics, etc.) frequency (frequency n. 4b) having a relatively large number of cycles in a second; an instance of this; an electric current or voltage, an electromagnetic wave, or a sound wave so characterized; spec. (in radio and telecommunications) a frequency of an electromagnetic wave in the range 3–30 MHz (abbreviated HF), between medium frequency (MF) and very high frequency (VHF), corresponding to a wavelength of 10–100 metres .

ΘΚΠ

society > communication > telecommunication > [noun] > signal > frequency or band of frequencies

high frequency1842

low frequency1900

voice frequency1905

audio frequency1913

pulsatance1919

medium frequency1920

side frequency1920

intermediate frequency1924

bass1930

frequency1943

frequency spectrum1955

the world > matter > physics > mechanics > types of motion > [noun] > vibration or oscillation > frequency > high or low frequency

low frequency1839

high frequency1842

the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > frequency > specific frequencies

high frequency1842

natural frequency1873

resonant frequency1897

resonance frequency1898

low frequency1928

modulation frequency1930

quench frequency1938

gyrofrequency1941

Nyquist frequency1963

the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [noun] > rate of recurrence > unit of > as measured in

high frequency1842

low frequency1900

1842 Prov. Med. Jrnl. 17 Sept. 472/1 When the pulse maintains a high frequency during the early stage of the disease, a lingering illness..may be looked for.

1872 J. D. Everett Deschanel's Elem. Treat. Nat. Philos. IV. lvii. 866 The vibrations of the æther are capable of producing other effects besides illumination... Vibrations of high frequency, or short period, are the most active chemically.

1891 Eng. Mechanic 53 469/2 A current of very high frequency and a very high potential.

1923 Nature 7 July 12/2 The vibrations are of frequency 200,000 per second, such as are commonly used in wireless telegraphy and telephony. Such high frequencies are neither seen nor heard, but can be detected by special methods.

1925 Proc. Physical Soc. 38 399 Very accurate measurements of the velocity of sound at very high frequencies.

1962 Newnes Conc. Encycl. Electr. Engin. 360/1 At high frequencies above 1,000 c/s there is an increasing tendency for the current to flow in a shallow surface layer of the conductor.

1988 ICL Techn. Jrnl. 6 125 Owing to their ability to operate at very high frequencies, coaxial cables can be used to transmit broadband signals.

1993 New Scientist 4 Sept. 22/2 The high frequencies of the violins.

2009 S. Blundell Superconductivity: Very Short Introd. ix. 136 Superconductors find their way into certain applications where high frequencies are needed, for example in antennas, filters, and mixers in microwave circuits.

2. A high rate of occurrence over a particular period of time or in a given sample.

ΘΚΠ

the world > time > frequency > [noun] > high frequency

high frequency1890

1890 Amer. Jrnl. Philol. 11 269 The high frequency of the art. inf. [= articular infinitive] in Polybius as compared with classical prose writers.

1935 J. S. Huxley & A. C. Haddon We Europeans ix. 267 Our picture of the human species will be like a contour-map, a region of high frequency for, say, round-headedness being separated from another similar peak by a ‘valley’ of low frequency.

1971 Sci. Amer. Oct. 21/1 A high frequency of kwashiorkor is now being found among the East Pakistan refugees in India.

2007 Daily Tel. 19 Mar. 23/5 As pilots, we are schooled to aviate, navigate, communciate—in that order of priority—and with a high frequency of switching from one mode to another.

B. adj. (originally and chiefly attributive)

1. Characterized by a high frequency (sense A. 1); of or relating to a high frequency; (of equipment) that operates at or deals with high frequencies.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [adjective] > of specific frequency

low frequency1873

high frequency1891

radio frequency1915

1891 N. Tesla in Trans. Amer. Inst. Electr. Engineers 1890–91 8 275 (caption) High frequency alternator with drum armature.

1892 Times 5 May 10/1 The physiological action of the high frequency current is feeble.

1903 Daily Chron. 14 Nov. 5/2 High-frequency apparatus and superb laboratories are beside the point compared with air and light.

1914 R. Stanley Text-bk. Wireless Telegr. xii. 149 Do high and low frequency waves travel at the same speed?

1928 Nature 21 Apr. 623/1 High frequency sound waves of low intensity passed through these cells cause the protoplasm to rotate.

1955 F. E. Terman et al. Electronic & Radio Engin. (ed. 4) xxiv. 937 These requirements are usually more difficult to meet at the high-frequency end of the modulation range.

1960 R. W. Marks Dymaxion World Buckminster Fuller 23/1 The high-frequency hiss of the surf.

2006 D. Edgerton Shock of Old vii. 187 The cavity magnetron..generates high-power high-frequency radio waves.

2012 Adv. Chem. Physics 150 265 The local averaging time, t_L, defines the separation of what is high frequency and what is low frequency compared to a local averaging frequency.

2. That occurs relatively often. Also: characterized by a high rate of occurrence over a particular period of time or in a given sample.

ΚΠ

1927 Elem. School Jrnl. 27 (front matter) Small, highly repetitive vocabulary of high frequency words.

1965 Eng. Stud. Feb. 75 It is hard to judge of the size of the corpus..but it seems to be adequate at least for high-frequency items.

1984 Proc. National Acad. Sci. U.S.A. 81 7069/2 Co-transformation of unlinked nuclear markers is a high-frequency event in mammalian systems.

1998 D. Mueller-Dombois & F. R. Fosberg Vegetation Trop. Pacific Islands i. 31 The third high-frequency area is in the southern West Pacific.

2007 S. J. Wonderlich Predictors of Bullying Behaviors iii. 71 Some of the categories are very high frequency and others are low frequency.

Compounds

high-frequency alternator n. Electrical Engineering (now chiefly historical) any of several kinds of alternator designed to give an alternating current with a frequency greater than about 10 kHz.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > dynamo > [noun] > dynamo giving alternating current

alternator1878

high-frequency alternator1891

1891high frequency alternator [see sense B. 1].

1935 J. B. Moore in K. Henney Radio Engin. Handbk. (ed. 2) 564 The high-frequency alternator is one of the most used types of transmitter for long-wave transoceanic code communication.

2006 T. C. Campbell Wireless Writing in Age of Marconi iv. 104 High-frequency alternators and the stronger signals they sent now meant that commanders could direct men to their deaths from a bunker, a lab, or a studio.

high-frequency amplification n. amplification of signals or sounds of high frequency; (Electronics) amplification at the carrier frequency in a receiver.

ΘΚΠ

society > communication > telecommunication > radio communications > [noun] > other methods or operations

quenchinga1300

high-frequency amplification1919

self-heterodyning1922

neutrodyning1924

preselection1924

1919 Wireless World Nov. 448 An eight valve amplifier, comprising five stages of high-frequency amplification, one stage of rectification, and two stages of audio-frequency amplification.

1930 Proc. IRE 18 1715 There are two stages of push-pull high-frequency amplification.

1995 M. H. Jones Pract. Introd. Electronic Circuits (ed. 3) vii. 164 This is the dual-gate MOSFET sometimes used in high-frequency amplification.

2001 H. Dillon Hearing Aids xii. 308 Excessive low-frequency amplification or insufficient high-frequency amplification may be described as muffled, unclear, boomy or dull.

high-frequency heating n. the heating of something by subjecting it to a high-frequency electric or magnetic field.Cf. dielectric heating n. at dielectric n. and adj. Additions, induction heating n. at induction n. Compounds 2.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction heating

induction heating1919

high-frequency heating1922

1922 Jrnl. Inst. Electr. Engineers 60 853/1 I did some research work on the high-frequency heating of filaments, and the results were very satisfactory.

1947 P. I. Smith Pract. Plastics iii. 42/2 The adoption of high-frequency heating as a pretreatment of mould-stuffs should enable very large..mouldings to be produced economically.

2010 F. Mohos Confectionary & Chocolate Engin. iii. 76 High-frequency heating is usually carried out at radio frequencies between 13.9 and 27 MHz and microwave heating at between 915 and 2450 MHz.

high-frequency induction furnace n. Metallurgy an induction furnace in which a high-frequency electric current is used.

ΘΚΠ

society > occupation and work > equipment > furnace or kiln > furnace > [noun] > types of furnace by method of operation

lamp-furnace1651

wind-furnace1651

reverbatory1656

blast furnace1706

revolver1879

run-out1881

flame-furnace1888

producer1890

resistance furnace1897

induction furnace1907

suction plant1909

high-frequency induction furnace1918

solar furnace1924

roller hearth furnace1927

the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction heating > apparatus for

high-frequency induction furnace1918

induction heater1919

1918 Jrnl. Inst. Metals 20 351 (heading) High-frequency induction furnace.

1946 V. N. Wood Metall. Materials i. 40 The high-frequency induction furnace is crucible-shaped. The charge is melted by the heat produced in it by eddy currents developed by a high-frequency current.

2000 T. Meguro & K. Komeya in Y. Kumashiro Electric Refractory Materials xxv. 680 In order to change the temperature gradient, two types of induction coil for the high-frequency induction furnace were employed.

high-frequency resistance n. (a) increased electrical resistance of a conductor at high frequencies (cf. skin effect n. at skin n. Compounds 5); (b) a resistance for use at high frequencies or that is effective at high frequencies.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun]

resistance1746

R1842

water resistance1859

resistivity1885

skin effect1890

high-frequency resistance1892

leak1896

negative resistance1896

photoresistance1925

piezoresistance1954

piezoresistivity1958

the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > [noun] > resistor

high-frequency resistance1892

decade1911

voltage divider1930

bleeder resistance or resistor1935

resistor1947

1892 O. Heaviside Electr. Papers II. 193 The high-frequency resistance is independent of the steady resistance, and must be much greater than it.

1926 S. O. Pearson Dict. Wireless Techn. Terms 42 This is done to reduce the high-frequency resistance of the aerial.

1951 A. Hund High-frequency Measurem. (ed. 2) ii. 96 Any amplitude differences are balanced out by properly chosen high-frequency resistances.

2010 D. S. Hussey & D. L. Jacobson in U. Pasaogullari & Chao-Yang Wang Modeling & Diagnostics Polymer Electrolyte Fuel Cells iv. 197 This led to a lower high-frequency resistance, as well as better cell performance for counter-flow.

high-frequency treatment n. treatment using high-frequency electric currents, esp. for medicinal or cosmetic purposes; an instance of this.

ΘΚΠ

the world > health and disease > healing > medical treatment > treatment by electricity > [noun] > other electrical treatments

galvanism1797

Franklinization18..

electropathy1842

electrogenesis1847

high-frequency treatment1902

diathermy1910

society > occupation and work > industry > working with specific materials > working with metal > [noun] > hardening, tempering, or annealing > heating followed by quenching

high-frequency treatment1902

solution treatment1931

quench hardening1934

solution heat treatment1935

induction hardening1941

solutionizing1977

1902 Jrnl. Physical Therapeutics 3 103 I have myself noted the action of high frequency treatment in reducing the stoutness of one patient, and many instances of the kind have been recorded.

1921 S. Tousey Med. Electr., Röntgen Rays & Radium (ed. 3) 579 In one case of diabetes there was marked acetonuria, which completely disappeared during a course of high-frequency treatments.

1992 W. G. Jaffé & D. S. Seidl in A. T. Tu Food Poisoning xi. 270 Heintze (1950) found dry heating or high frequency treatment ineffective for the cooking of beans.

2010 Scunthorpe Evening Tel. (Nexis) Aug. 18 High frequency treatments help dry out spots and have an antibacterial effect.

This entry has been updated (OED Third Edition, September 2014; most recently modified version published online June 2022).

单词	high frequency
释义	high frequencyn.adj. Brit. /ˌhʌɪ ˈfriːkw(ə)nsi/, U.S. /ˌhaɪ ˈfrikwənsi/ Origin: Formed within English, by compounding. Etymons: high adj., frequency n. Etymology: < high adj. + frequency n. A. n. 1. A high rate of occurrence of any regularly repeated event, so that the interval between successive events is correspondingly small; (Physics, etc.) frequency (frequency n. 4b) having a relatively large number of cycles in a second; an instance of this; an electric current or voltage, an electromagnetic wave, or a sound wave so characterized; spec. (in radio and telecommunications) a frequency of an electromagnetic wave in the range 3–30 MHz (abbreviated HF), between medium frequency (MF) and very high frequency (VHF), corresponding to a wavelength of 10–100 metres . ΘΚΠ society > communication > telecommunication > [noun] > signal > frequency or band of frequencies high frequency1842 low frequency1900 voice frequency1905 audio frequency1913 pulsatance1919 medium frequency1920 side frequency1920 intermediate frequency1924 bass1930 frequency1943 frequency spectrum1955 the world > matter > physics > mechanics > types of motion > [noun] > vibration or oscillation > frequency > high or low frequency low frequency1839 high frequency1842 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > frequency > specific frequencies high frequency1842 natural frequency1873 resonant frequency1897 resonance frequency1898 low frequency1928 modulation frequency1930 quench frequency1938 gyrofrequency1941 Nyquist frequency1963 the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [noun] > rate of recurrence > unit of > as measured in high frequency1842 low frequency1900 1842 Prov. Med. Jrnl. 17 Sept. 472/1 When the pulse maintains a high frequency during the early stage of the disease, a lingering illness..may be looked for. 1872 J. D. Everett Deschanel's Elem. Treat. Nat. Philos. IV. lvii. 866 The vibrations of the æther are capable of producing other effects besides illumination... Vibrations of high frequency, or short period, are the most active chemically. 1891 Eng. Mechanic 53 469/2 A current of very high frequency and a very high potential. 1923 Nature 7 July 12/2 The vibrations are of frequency 200,000 per second, such as are commonly used in wireless telegraphy and telephony. Such high frequencies are neither seen nor heard, but can be detected by special methods. 1925 Proc. Physical Soc. 38 399 Very accurate measurements of the velocity of sound at very high frequencies. 1962 Newnes Conc. Encycl. Electr. Engin. 360/1 At high frequencies above 1,000 c/s there is an increasing tendency for the current to flow in a shallow surface layer of the conductor. 1988 ICL Techn. Jrnl. 6 125 Owing to their ability to operate at very high frequencies, coaxial cables can be used to transmit broadband signals. 1993 New Scientist 4 Sept. 22/2 The high frequencies of the violins. 2009 S. Blundell Superconductivity: Very Short Introd. ix. 136 Superconductors find their way into certain applications where high frequencies are needed, for example in antennas, filters, and mixers in microwave circuits. 2. A high rate of occurrence over a particular period of time or in a given sample. ΘΚΠ the world > time > frequency > [noun] > high frequency high frequency1890 1890 Amer. Jrnl. Philol. 11 269 The high frequency of the art. inf. [= articular infinitive] in Polybius as compared with classical prose writers. 1935 J. S. Huxley & A. C. Haddon We Europeans ix. 267 Our picture of the human species will be like a contour-map, a region of high frequency for, say, round-headedness being separated from another similar peak by a ‘valley’ of low frequency. 1971 Sci. Amer. Oct. 21/1 A high frequency of kwashiorkor is now being found among the East Pakistan refugees in India. 2007 Daily Tel. 19 Mar. 23/5 As pilots, we are schooled to aviate, navigate, communciate—in that order of priority—and with a high frequency of switching from one mode to another. B. adj. (originally and chiefly attributive) 1. Characterized by a high frequency (sense A. 1); of or relating to a high frequency; (of equipment) that operates at or deals with high frequencies. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [adjective] > of specific frequency low frequency1873 high frequency1891 radio frequency1915 1891 N. Tesla in Trans. Amer. Inst. Electr. Engineers 1890–91 8 275 (caption) High frequency alternator with drum armature. 1892 Times 5 May 10/1 The physiological action of the high frequency current is feeble. 1903 Daily Chron. 14 Nov. 5/2 High-frequency apparatus and superb laboratories are beside the point compared with air and light. 1914 R. Stanley Text-bk. Wireless Telegr. xii. 149 Do high and low frequency waves travel at the same speed? 1928 Nature 21 Apr. 623/1 High frequency sound waves of low intensity passed through these cells cause the protoplasm to rotate. 1955 F. E. Terman et al. Electronic & Radio Engin. (ed. 4) xxiv. 937 These requirements are usually more difficult to meet at the high-frequency end of the modulation range. 1960 R. W. Marks Dymaxion World Buckminster Fuller 23/1 The high-frequency hiss of the surf. 2006 D. Edgerton Shock of Old vii. 187 The cavity magnetron..generates high-power high-frequency radio waves. 2012 Adv. Chem. Physics 150 265 The local averaging time, t_L, defines the separation of what is high frequency and what is low frequency compared to a local averaging frequency. 2. That occurs relatively often. Also: characterized by a high rate of occurrence over a particular period of time or in a given sample. ΚΠ 1927 Elem. School Jrnl. 27 (front matter) Small, highly repetitive vocabulary of high frequency words. 1965 Eng. Stud. Feb. 75 It is hard to judge of the size of the corpus..but it seems to be adequate at least for high-frequency items. 1984 Proc. National Acad. Sci. U.S.A. 81 7069/2 Co-transformation of unlinked nuclear markers is a high-frequency event in mammalian systems. 1998 D. Mueller-Dombois & F. R. Fosberg Vegetation Trop. Pacific Islands i. 31 The third high-frequency area is in the southern West Pacific. 2007 S. J. Wonderlich Predictors of Bullying Behaviors iii. 71 Some of the categories are very high frequency and others are low frequency. Compounds high-frequency alternator n. Electrical Engineering (now chiefly historical) any of several kinds of alternator designed to give an alternating current with a frequency greater than about 10 kHz. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > dynamo > [noun] > dynamo giving alternating current alternator1878 high-frequency alternator1891 1891high frequency alternator [see sense B. 1]. 1935 J. B. Moore in K. Henney Radio Engin. Handbk. (ed. 2) 564 The high-frequency alternator is one of the most used types of transmitter for long-wave transoceanic code communication. 2006 T. C. Campbell Wireless Writing in Age of Marconi iv. 104 High-frequency alternators and the stronger signals they sent now meant that commanders could direct men to their deaths from a bunker, a lab, or a studio. high-frequency amplification n. amplification of signals or sounds of high frequency; (Electronics) amplification at the carrier frequency in a receiver. ΘΚΠ society > communication > telecommunication > radio communications > [noun] > other methods or operations quenchinga1300 high-frequency amplification1919 self-heterodyning1922 neutrodyning1924 preselection1924 1919 Wireless World Nov. 448 An eight valve amplifier, comprising five stages of high-frequency amplification, one stage of rectification, and two stages of audio-frequency amplification. 1930 Proc. IRE 18 1715 There are two stages of push-pull high-frequency amplification. 1995 M. H. Jones Pract. Introd. Electronic Circuits (ed. 3) vii. 164 This is the dual-gate MOSFET sometimes used in high-frequency amplification. 2001 H. Dillon Hearing Aids xii. 308 Excessive low-frequency amplification or insufficient high-frequency amplification may be described as muffled, unclear, boomy or dull. high-frequency heating n. the heating of something by subjecting it to a high-frequency electric or magnetic field.Cf. dielectric heating n. at dielectric n. and adj. Additions, induction heating n. at induction n. Compounds 2. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction heating induction heating1919 high-frequency heating1922 1922 Jrnl. Inst. Electr. Engineers 60 853/1 I did some research work on the high-frequency heating of filaments, and the results were very satisfactory. 1947 P. I. Smith Pract. Plastics iii. 42/2 The adoption of high-frequency heating as a pretreatment of mould-stuffs should enable very large..mouldings to be produced economically. 2010 F. Mohos Confectionary & Chocolate Engin. iii. 76 High-frequency heating is usually carried out at radio frequencies between 13.9 and 27 MHz and microwave heating at between 915 and 2450 MHz. high-frequency induction furnace n. Metallurgy an induction furnace in which a high-frequency electric current is used. ΘΚΠ society > occupation and work > equipment > furnace or kiln > furnace > [noun] > types of furnace by method of operation lamp-furnace1651 wind-furnace1651 reverbatory1656 blast furnace1706 revolver1879 run-out1881 flame-furnace1888 producer1890 resistance furnace1897 induction furnace1907 suction plant1909 high-frequency induction furnace1918 solar furnace1924 roller hearth furnace1927 the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction heating > apparatus for high-frequency induction furnace1918 induction heater1919 1918 Jrnl. Inst. Metals 20 351 (heading) High-frequency induction furnace. 1946 V. N. Wood Metall. Materials i. 40 The high-frequency induction furnace is crucible-shaped. The charge is melted by the heat produced in it by eddy currents developed by a high-frequency current. 2000 T. Meguro & K. Komeya in Y. Kumashiro Electric Refractory Materials xxv. 680 In order to change the temperature gradient, two types of induction coil for the high-frequency induction furnace were employed. high-frequency resistance n. (a) increased electrical resistance of a conductor at high frequencies (cf. skin effect n. at skin n. Compounds 5); (b) a resistance for use at high frequencies or that is effective at high frequencies. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] resistance1746 R1842 water resistance1859 resistivity1885 skin effect1890 high-frequency resistance1892 leak1896 negative resistance1896 photoresistance1925 piezoresistance1954 piezoresistivity1958 the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > [noun] > resistor high-frequency resistance1892 decade1911 voltage divider1930 bleeder resistance or resistor1935 resistor1947 1892 O. Heaviside Electr. Papers II. 193 The high-frequency resistance is independent of the steady resistance, and must be much greater than it. 1926 S. O. Pearson Dict. Wireless Techn. Terms 42 This is done to reduce the high-frequency resistance of the aerial. 1951 A. Hund High-frequency Measurem. (ed. 2) ii. 96 Any amplitude differences are balanced out by properly chosen high-frequency resistances. 2010 D. S. Hussey & D. L. Jacobson in U. Pasaogullari & Chao-Yang Wang Modeling & Diagnostics Polymer Electrolyte Fuel Cells iv. 197 This led to a lower high-frequency resistance, as well as better cell performance for counter-flow. high-frequency treatment n. treatment using high-frequency electric currents, esp. for medicinal or cosmetic purposes; an instance of this. ΘΚΠ the world > health and disease > healing > medical treatment > treatment by electricity > [noun] > other electrical treatments galvanism1797 Franklinization18.. electropathy1842 electrogenesis1847 high-frequency treatment1902 diathermy1910 society > occupation and work > industry > working with specific materials > working with metal > [noun] > hardening, tempering, or annealing > heating followed by quenching high-frequency treatment1902 solution treatment1931 quench hardening1934 solution heat treatment1935 induction hardening1941 solutionizing1977 1902 Jrnl. Physical Therapeutics 3 103 I have myself noted the action of high frequency treatment in reducing the stoutness of one patient, and many instances of the kind have been recorded. 1921 S. Tousey Med. Electr., Röntgen Rays & Radium (ed. 3) 579 In one case of diabetes there was marked acetonuria, which completely disappeared during a course of high-frequency treatments. 1992 W. G. Jaffé & D. S. Seidl in A. T. Tu Food Poisoning xi. 270 Heintze (1950) found dry heating or high frequency treatment ineffective for the cooking of beans. 2010 Scunthorpe Evening Tel. (Nexis) Aug. 18 High frequency treatments help dry out spots and have an antibacterial effect. This entry has been updated (OED Third Edition, September 2014; most recently modified version published online June 2022). < n.adj.1842
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