radiopacityn.

Brit.

/ˌreɪdɪə(ʊ)ˈpasᵻti/, U.S.

/ˌreɪdioʊˈpæsədi/

Forms: 1900s– radio-opacity, 1900s– radiopacity.

Origin: Formed within English, by blending. Etymons: radio- comb. form², opacity n.

Etymology: Blend of radio- comb. form² and opacity n., after radiopaque adj.

The state or property of being impervious to X-rays. Cf. radiopaque adj.

ΘΚΠ

the world > matter > physics > atomic nucleus > radioactivity > X-rays > [noun] > imperviousness to X-rays

opacity1634

radiopacity1917

1917 R. Ottolengui in Dental Items of Interest Feb. 143 We may coin the word ‘radiopaque’, and it would definitely mean ‘impervious to the X-ray’... From radiopaque we would likewise have the useful term radiopacity.

1917 K. H. Thoma Oral Roentgenol. iv. iv. 197 Unsanitary concretions, such as salivary..calculi, can be seen on account of their radiopacity.

1932 Lancet 10 Sept. 568/2 When..the gall-bladder has been filled with bile containing tetraiodophenolphthalein, which has a greater radio-opacity than the stones, these appear as darker shadows, resembling gas-bubbles.

1971 Brit. Dental Jrnl. 130 430/1 The localised radiopacity caused by the superimposition of shadows can be very misleading, therefore patients should be instructed to remove their ear-rings before the picture is taken.

1993 S. J. Ettinger Pocket Compan. Textbk. Vet. Internal Med. lxviii. 303 Tracheal foreign bodies have varying degrees of radiopacity.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).

单词	radiopacity
释义	radiopacityn. Brit. /ˌreɪdɪə(ʊ)ˈpasᵻti/, U.S. /ˌreɪdioʊˈpæsədi/ Forms: 1900s– radio-opacity, 1900s– radiopacity. Origin: Formed within English, by blending. Etymons: radio- comb. form², opacity n. Etymology: Blend of radio- comb. form² and opacity n., after radiopaque adj. The state or property of being impervious to X-rays. Cf. radiopaque adj. ΘΚΠ the world > matter > physics > atomic nucleus > radioactivity > X-rays > [noun] > imperviousness to X-rays opacity1634 radiopacity1917 1917 R. Ottolengui in Dental Items of Interest Feb. 143 We may coin the word ‘radiopaque’, and it would definitely mean ‘impervious to the X-ray’... From radiopaque we would likewise have the useful term radiopacity. 1917 K. H. Thoma Oral Roentgenol. iv. iv. 197 Unsanitary concretions, such as salivary..calculi, can be seen on account of their radiopacity. 1932 Lancet 10 Sept. 568/2 When..the gall-bladder has been filled with bile containing tetraiodophenolphthalein, which has a greater radio-opacity than the stones, these appear as darker shadows, resembling gas-bubbles. 1971 Brit. Dental Jrnl. 130 430/1 The localised radiopacity caused by the superimposition of shadows can be very misleading, therefore patients should be instructed to remove their ear-rings before the picture is taken. 1993 S. J. Ettinger Pocket Compan. Textbk. Vet. Internal Med. lxviii. 303 Tracheal foreign bodies have varying degrees of radiopacity. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < n.1917
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