microfocusadj.n.

Brit.

/ˈmʌɪkrə(ʊ)ˌfəʊkəs/, U.S.

/ˈmaɪkroʊˌfoʊkəs/

Inflections: Plural (in sense B.) microfoci Brit.

/ˌmʌɪkrə(ʊ)ˈfəʊkʌɪ/,

/ˌmʌɪkrə(ʊ)ˈfəʊsʌɪ/, U.S.

/ˈˌmaɪkrəˈfoʊˌsaɪ/.

Origin: Formed within English, by compounding. Etymons: micro- comb. form, focus n.

Etymology: < micro- comb. form + focus n.

A. adj.

Capable of being focused on a very small area; spec. (of an X-ray tube or other radiation source) having a very small focal spot (typically a few microns in diameter).

ΚΠ

1951 Science 7 Dec. 615/2 Of considerable interest will be the exhibit of the new Hilger Micro-focus X-ray tube.

1960 Science 21 Oct. 1073 Microfocus X-ray analyzer/ a specialized device for x-ray chemical analysis... Unexcelled for identification of minute impurities or inclusions in small samples.

1979 Philos. Trans. (Royal Soc.) A. 292 149 Microfocus X-ray tubes..have been developed with focal spots between 10 and 100 μm.

1992 New Scientist 14 Mar. 33/1 Advanced X-ray optics will figure in one of the first beamlines to be ready, the microfocus beamline. It will exploit a wiggler producing tunable radiation with up to 40 keV of energy focused to a tiny spot only 10 micrometres across.

1999 Dentomaxillofacial Radiol. 28 249 Radiographs of anatomical specimens and extracted teeth were prepared under clinical conditions using a microfocus (8 and 16 microns focal diameter) X-ray tube.

B. n. Medicine.

A small (often microscopic) centre of infection or disease, esp. in a culture, tissue, or organ.

ΚΠ

1964 Lancet 20 June 1365/1 Further experience with these cells and changes in technique have enabled us to recognise focal changes either by low-power microscopy (microfoci) or later by the naked eye (macroplaques).

1978 Brit. Jrnl. Pharmacol. 62 289 A technique is described for the induction of an acute short-lived epileptiform focus... The effects of anticonvulsants on this microfocus have been studied.

1989 Amer. Jrnl. Surg. Pathol. 13 5 Microinvasive carcinoma..includes a microfocus of submucosal invasion within 1-2 mm of the overlying epithelial basal lamina.

1998 Jrnl. Obstetrics & Gynecol. Res. 24 27 In addition, the left tube contained 3 scattered lesions of carcinoma in situ, one of which was accompanied by a microfocus of definite stromal invasion confined within the endosalpingeal mucosa.

This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	microfocus
释义	microfocusadj.n. Brit. /ˈmʌɪkrə(ʊ)ˌfəʊkəs/, U.S. /ˈmaɪkroʊˌfoʊkəs/ Inflections: Plural (in sense B.) microfoci Brit. /ˌmʌɪkrə(ʊ)ˈfəʊkʌɪ/, /ˌmʌɪkrə(ʊ)ˈfəʊsʌɪ/, U.S. /ˈˌmaɪkrəˈfoʊˌsaɪ/. Origin: Formed within English, by compounding. Etymons: micro- comb. form, focus n. Etymology: < micro- comb. form + focus n. A. adj. Capable of being focused on a very small area; spec. (of an X-ray tube or other radiation source) having a very small focal spot (typically a few microns in diameter). ΚΠ 1951 Science 7 Dec. 615/2 Of considerable interest will be the exhibit of the new Hilger Micro-focus X-ray tube. 1960 Science 21 Oct. 1073 Microfocus X-ray analyzer/ a specialized device for x-ray chemical analysis... Unexcelled for identification of minute impurities or inclusions in small samples. 1979 Philos. Trans. (Royal Soc.) A. 292 149 Microfocus X-ray tubes..have been developed with focal spots between 10 and 100 μm. 1992 New Scientist 14 Mar. 33/1 Advanced X-ray optics will figure in one of the first beamlines to be ready, the microfocus beamline. It will exploit a wiggler producing tunable radiation with up to 40 keV of energy focused to a tiny spot only 10 micrometres across. 1999 Dentomaxillofacial Radiol. 28 249 Radiographs of anatomical specimens and extracted teeth were prepared under clinical conditions using a microfocus (8 and 16 microns focal diameter) X-ray tube. B. n. Medicine. A small (often microscopic) centre of infection or disease, esp. in a culture, tissue, or organ. ΚΠ 1964 Lancet 20 June 1365/1 Further experience with these cells and changes in technique have enabled us to recognise focal changes either by low-power microscopy (microfoci) or later by the naked eye (macroplaques). 1978 Brit. Jrnl. Pharmacol. 62 289 A technique is described for the induction of an acute short-lived epileptiform focus... The effects of anticonvulsants on this microfocus have been studied. 1989 Amer. Jrnl. Surg. Pathol. 13 5 Microinvasive carcinoma..includes a microfocus of submucosal invasion within 1-2 mm of the overlying epithelial basal lamina. 1998 Jrnl. Obstetrics & Gynecol. Res. 24 27 In addition, the left tube contained 3 scattered lesions of carcinoma in situ, one of which was accompanied by a microfocus of definite stromal invasion confined within the endosalpingeal mucosa. This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022). < adj.n.1951
随便看	retranscription retransfer retransferred retransferring retransfers retransfigure retransform retransformation retransformations resonance absorption resonance apparatus resonance box resonance capture resonance cavity resonance chamber resonance energy resonance fluorescence resonance frequency resonance hybrid resonance level resonance particle resonance radiation resonance raman resonance scattering resonance stabilization