释义 |
usnin Chem.|ˈʌsnɪn| Also -ine. [f. usn-ea + -in1.] Usnic acid.
1861H. Macmillan Footn. fr. Page Nat. 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. 1867Brande & Cox Dict. Sci., etc. III. 912/2 Usnin or Usnic Acid..forms yellow crystals, which with great difficulty are fused like a resin. |