polycyclicadj.n.

Brit.

/ˌpɒlɪˈsʌɪklɪk/, U.S.

/ˌpɑliˈsɪklɪk/,

/ˌpɑliˈsaɪklɪk/

Origin: Formed within English, by compounding. Etymons: poly- comb. form, cyclic adj.

Etymology: < poly- comb. form + cyclic adj. In sense A. 5 after French polycyclique (E. Argand 1922, in Compt. rend. XIII session Congrès Géol. Internat. (1924) I. 365). Compare monocyclic adj.With sense A. 2 compare earlier monocyclic adj. 3, bicyclic adj.² 1, tetracyclic adj., pentacyclic adj. at penta- comb. form 1, hexacyclic adj. at hexa- comb. form . With sense A. 3 compare earlier tricyclic adj. 2, pentacyclic adj. at penta- comb. form 1.

A. adj.

1. Mathematics.

a. Relating to or involving more than one closed curve.

ΘΚΠ

the world > relative properties > number > algebra > [adjective] > relating to expressions > relating to functions

generating1671

exponential1704

discontinuous1803

functional1806

odd1812

periodic1820

syzygetic1850

convex1858

graphometric1865

polycyclic1869

subrational1875

synectic1876

variational1879

polyhedral1881

holomorphic1886

tropical1887

Gudermannian1888

monogeneous1888

monotonous1890

oscillating1893

monotonic1901

monotone1903

orthogonalized1909

schlicht1925

concave1942

deconvolved1974

unate1978

1869 W. Thomson in Trans. Royal Soc. Edinb. 25 253 When the function is cyclic with reference to several different mutually irreconcilable circuits, it is called polycyclic.

1888 A. B. Basset Treat. Hydrodynamics I. iv. 75 Every polycyclic function may be expressed as the sum of..monocyclic functions.

1908 Proc. Royal Soc. A. 81 p. lx Helmholtz got into the same subject, the modified Lagrangian function, in a series of papers on the Statics of Monocyclic and Polycyclic Systems.

1985 Match No. 17. 121 A general formula is proposed for the asymptotic values of J and J' in infinite acyclic and polycyclic systems, respectively, with a finite number of branches.

b. Of a group: having the property that each element of the group can be expressed as a power of any of two or more elements; having more than one generator (generator n. 2b). Cf. cyclic adj. Additions b.

ΚΠ

1927 Amer. Jrnl. Math. 49 252 The polycyclic invariants are expressed..in terms of linear invariants.

1963 Trans. Amer. Math. Soc. 106 208 If A and B are polycyclic, then σ (A, B: in the centre of B) ⊂ rℱ.

1990 Proc. London Math. Soc. 61 497 The picture is quite different..when one restricts attention to the class of polycyclic-by-finite groups, which..is the largest subgroup- and quotient-closed class known to consist of finitely presented groups.

2. Chiefly Botany. Having or consisting of many rings, whorls, etc.; (spec.) having two or more concentric rings of vascular strands in the stele. Also: having a variable number of floral whorls.

ΘΚΠ

the world > space > shape > curvature > coil > [adjective] > having many (spiral) coils

forwrithen1401

multispiral1839

polygyral1885

polycyclic1890

1890 Cent. Dict. XVI. 4601/2 Polycyclic, having many rounds, turns, or whorls, as a shell.

1896 Bot. Gaz. 22 507 He recognizes the two monocotyledonous groups, the eucyclic..and the polycyclic (unstable floral structure and varying number of whorls).

1903 New Phytologist 2 41 Matonia and other ferns having a ‘polycyclic’ arrangement of vascular strands in their stems.

1967 Canad. Med. Assoc. Jrnl. 9 Sept. (Abstracts) 20/2 Localized polycyclic calcification of the liver is characteristic [of hydatid disease].

1992 M. Ingrouille Diversity & Evol. Land Plants 75 Several separate steles may be produced in a stem, either concentric, a polycyclic stele.., or running in parallel, a polystele.

3. Chemistry. Esp. of an aromatic hydrocarbon: having more than one ring of atoms in the molecule.

ΘΚΠ

the world > matter > chemistry > organic chemistry > [adjective] > organic structure > cyclic or ring compounds > polycyclic

polycyclic1903

multicyclic1961

1903 Chem. News 13 Mar. 130/2 (heading) A method for the synthesis of polycyclic hydrocarbides.

1943 Endeavour Jan. 32/2 Carcinogenic potency is by no means confined to polycyclic compounds.

1994 Biogr. Mem. Fellows Royal Soc. 40 96 It had been known since the 1940s that many microorganisms could use polycyclic hydrocarbons..as a source of carbon and energy.

4. Electrical Engineering. Involving or utilizing the simultaneous transmission along a conductor of currents of different frequencies and voltages. Now rare.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > voltage > [adjective] > involving simultaneous transmission

polycyclic1903

the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > distribution system > [adjective]

polycyclic1903

the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [adjective] > involving different frequencies

polycyclic1903

1903 Jrnl. Inst. Electr. Engineers 32 751 The advantages of low frequency for power work and of high frequency for lighting are combined in this polycyclic system.

1913 S. P. Smith tr. J. L. La Cour & O. S. Bragstad Theory & Calculation Electr. Currents xvi. 289 The object of the polycyclic system..is to simultaneously transmit electrical energy by means of currents at different pressures and frequencies through one and the same conductor, and to distribute the same without their affecting one another.

1937 Science 12 Feb. 185/2 The A.C. supply for the motor was obtained from the inverter shown... This is known as the double capacity single phase polycyclic type of inverter.

5. Geology. Produced by or having undergone many cycles, esp. of erosion and deposition.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > sedimentation > [adjective] > cycle

multicycle1916

polycyclic1935

multicyclic1952

1935 H. Baulig Changing Sea Level ii. 13 (caption) Block-diagram of a polycyclic valley.

1968 R. W. Fairbridge Encycl. Geomorphol. 554/2 A lateritic crust..reflects a polycyclic regime, usually as a result of repeated alternation of hot, humid conditions..with dry, evaporating conditions.

1992 Geol. Mag. 129 573 There is evidence for polycyclic material and volcanic detritus in both southerly and easterly derived samples.

6. Chiefly Zoology. Producing several generations in a year by sexual reproduction.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > reproductive cycle > [adjective]

polycyclic1957

1957 New Biol. 23 58 These polycyclic populations [of Daphnia] are found in complex environments like ponds where there are successive outbursts of different planktonic algae.

1970 Amer. Naturalist 104 398 In most polycyclic insects of the temperate zone, long days cause continuous development, while short days cause diapause.

1998 Jrnl. Great Lakes Res. 24 205 Eurasian ruffe is a polycyclic species with asynchronous ripening of eggs and protracted spawning.

B. n.

Chemistry. A polycyclic compound.

ΘΚΠ

the world > matter > chemistry > organic chemistry > [noun] > organic structure > cyclic or ring compounds > polycyclic

polycyclic1950

1950 Proc. Royal Soc. A. 201 7 The chemistry and technology of..anthraquinone derivatives and related polycyclics.

1976 Nature 9 Sept. 93/1 Binding of carcinogenic polycyclics to DNA..has been well established.

1989 Science 6 Oct. 53/1 Halogenated and sulfur-containing polycyclics showed relatively good sensitivity with a new radio frequency plasma detector.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polycyclic
释义	polycyclicadj.n. Brit. /ˌpɒlɪˈsʌɪklɪk/, U.S. /ˌpɑliˈsɪklɪk/, /ˌpɑliˈsaɪklɪk/ Origin: Formed within English, by compounding. Etymons: poly- comb. form, cyclic adj. Etymology: < poly- comb. form + cyclic adj. In sense A. 5 after French polycyclique (E. Argand 1922, in Compt. rend. XIII session Congrès Géol. Internat. (1924) I. 365). Compare monocyclic adj.With sense A. 2 compare earlier monocyclic adj. 3, bicyclic adj.² 1, tetracyclic adj., pentacyclic adj. at penta- comb. form 1, hexacyclic adj. at hexa- comb. form . With sense A. 3 compare earlier tricyclic adj. 2, pentacyclic adj. at penta- comb. form 1. A. adj. 1. Mathematics. a. Relating to or involving more than one closed curve. ΘΚΠ the world > relative properties > number > algebra > [adjective] > relating to expressions > relating to functions generating1671 exponential1704 discontinuous1803 functional1806 odd1812 periodic1820 syzygetic1850 convex1858 graphometric1865 polycyclic1869 subrational1875 synectic1876 variational1879 polyhedral1881 holomorphic1886 tropical1887 Gudermannian1888 monogeneous1888 monotonous1890 oscillating1893 monotonic1901 monotone1903 orthogonalized1909 schlicht1925 concave1942 deconvolved1974 unate1978 1869 W. Thomson in Trans. Royal Soc. Edinb. 25 253 When the function is cyclic with reference to several different mutually irreconcilable circuits, it is called polycyclic. 1888 A. B. Basset Treat. Hydrodynamics I. iv. 75 Every polycyclic function may be expressed as the sum of..monocyclic functions. 1908 Proc. Royal Soc. A. 81 p. lx Helmholtz got into the same subject, the modified Lagrangian function, in a series of papers on the Statics of Monocyclic and Polycyclic Systems. 1985 Match No. 17. 121 A general formula is proposed for the asymptotic values of J and J' in infinite acyclic and polycyclic systems, respectively, with a finite number of branches. b. Of a group: having the property that each element of the group can be expressed as a power of any of two or more elements; having more than one generator (generator n. 2b). Cf. cyclic adj. Additions b. ΚΠ 1927 Amer. Jrnl. Math. 49 252 The polycyclic invariants are expressed..in terms of linear invariants. 1963 Trans. Amer. Math. Soc. 106 208 If A and B are polycyclic, then σ (A, B: in the centre of B) ⊂ rℱ. 1990 Proc. London Math. Soc. 61 497 The picture is quite different..when one restricts attention to the class of polycyclic-by-finite groups, which..is the largest subgroup- and quotient-closed class known to consist of finitely presented groups. 2. Chiefly Botany. Having or consisting of many rings, whorls, etc.; (spec.) having two or more concentric rings of vascular strands in the stele. Also: having a variable number of floral whorls. ΘΚΠ the world > space > shape > curvature > coil > [adjective] > having many (spiral) coils forwrithen1401 multispiral1839 polygyral1885 polycyclic1890 1890 Cent. Dict. XVI. 4601/2 Polycyclic, having many rounds, turns, or whorls, as a shell. 1896 Bot. Gaz. 22 507 He recognizes the two monocotyledonous groups, the eucyclic..and the polycyclic (unstable floral structure and varying number of whorls). 1903 New Phytologist 2 41 Matonia and other ferns having a ‘polycyclic’ arrangement of vascular strands in their stems. 1967 Canad. Med. Assoc. Jrnl. 9 Sept. (Abstracts) 20/2 Localized polycyclic calcification of the liver is characteristic [of hydatid disease]. 1992 M. Ingrouille Diversity & Evol. Land Plants 75 Several separate steles may be produced in a stem, either concentric, a polycyclic stele.., or running in parallel, a polystele. 3. Chemistry. Esp. of an aromatic hydrocarbon: having more than one ring of atoms in the molecule. ΘΚΠ the world > matter > chemistry > organic chemistry > [adjective] > organic structure > cyclic or ring compounds > polycyclic polycyclic1903 multicyclic1961 1903 Chem. News 13 Mar. 130/2 (heading) A method for the synthesis of polycyclic hydrocarbides. 1943 Endeavour Jan. 32/2 Carcinogenic potency is by no means confined to polycyclic compounds. 1994 Biogr. Mem. Fellows Royal Soc. 40 96 It had been known since the 1940s that many microorganisms could use polycyclic hydrocarbons..as a source of carbon and energy. 4. Electrical Engineering. Involving or utilizing the simultaneous transmission along a conductor of currents of different frequencies and voltages. Now rare. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > voltage > [adjective] > involving simultaneous transmission polycyclic1903 the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > distribution system > [adjective] polycyclic1903 the world > matter > physics > electromagnetic radiation > electricity > electric current > alternating current > [adjective] > involving different frequencies polycyclic1903 1903 Jrnl. Inst. Electr. Engineers 32 751 The advantages of low frequency for power work and of high frequency for lighting are combined in this polycyclic system. 1913 S. P. Smith tr. J. L. La Cour & O. S. Bragstad Theory & Calculation Electr. Currents xvi. 289 The object of the polycyclic system..is to simultaneously transmit electrical energy by means of currents at different pressures and frequencies through one and the same conductor, and to distribute the same without their affecting one another. 1937 Science 12 Feb. 185/2 The A.C. supply for the motor was obtained from the inverter shown... This is known as the double capacity single phase polycyclic type of inverter. 5. Geology. Produced by or having undergone many cycles, esp. of erosion and deposition. ΘΚΠ the world > the earth > structure of the earth > formation of features > sedimentation > [adjective] > cycle multicycle1916 polycyclic1935 multicyclic1952 1935 H. Baulig Changing Sea Level ii. 13 (caption) Block-diagram of a polycyclic valley. 1968 R. W. Fairbridge Encycl. Geomorphol. 554/2 A lateritic crust..reflects a polycyclic regime, usually as a result of repeated alternation of hot, humid conditions..with dry, evaporating conditions. 1992 Geol. Mag. 129 573 There is evidence for polycyclic material and volcanic detritus in both southerly and easterly derived samples. 6. Chiefly Zoology. Producing several generations in a year by sexual reproduction. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive cycle > [adjective] polycyclic1957 1957 New Biol. 23 58 These polycyclic populations [of Daphnia] are found in complex environments like ponds where there are successive outbursts of different planktonic algae. 1970 Amer. Naturalist 104 398 In most polycyclic insects of the temperate zone, long days cause continuous development, while short days cause diapause. 1998 Jrnl. Great Lakes Res. 24 205 Eurasian ruffe is a polycyclic species with asynchronous ripening of eggs and protracted spawning. B. n. Chemistry. A polycyclic compound. ΘΚΠ the world > matter > chemistry > organic chemistry > [noun] > organic structure > cyclic or ring compounds > polycyclic polycyclic1950 1950 Proc. Royal Soc. A. 201 7 The chemistry and technology of..anthraquinone derivatives and related polycyclics. 1976 Nature 9 Sept. 93/1 Binding of carcinogenic polycyclics to DNA..has been well established. 1989 Science 6 Oct. 53/1 Halogenated and sulfur-containing polycyclics showed relatively good sensitivity with a new radio frequency plasma detector. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.n.1869
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