usninn.

/ˈʌsnɪn/

Forms: Also usnine.

Etymology: < usn- (in Usnea n.) + -in suffix¹.

Chemistry.

Usnic acid.

ΘΚΠ

the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > carbonic acid

usnic acid1847

usnin1861

1861 H. Macmillan Footnotes from Nature 82 Alpine lichens generally are more or less of a brown or black colour. This peculiarity seems to be owing to the presence of usnine or usnic acid.

1867 W. T. Brande & G. W. Cox Dict. Sci., Lit. & Art (new ed.) III. 912/2 Usnin or Usnic Acid..forms yellow crystals, which with great difficulty are fused like a resin.

This entry has not yet been fully updated (first published 1926; most recently modified version published online December 2020).

单词	usnin
释义	usninn. /ˈʌsnɪn/ Forms: Also usnine. Etymology: < usn- (in Usnea n.) + -in suffix¹. Chemistry. Usnic acid. ΘΚΠ the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > carbonic acid usnic acid1847 usnin1861 1861 H. Macmillan Footnotes from Nature 82 Alpine lichens generally are more or less of a brown or black colour. This peculiarity seems to be owing to the presence of usnine or usnic acid. 1867 W. T. Brande & G. W. Cox Dict. Sci., Lit. & Art (new ed.) III. 912/2 Usnin or Usnic Acid..forms yellow crystals, which with great difficulty are fused like a resin. This entry has not yet been fully updated (first published 1926; most recently modified version published online December 2020). < n.1861
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