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usnic acid

American  
[uhs-nik] / ˈʌs nɪk /

noun

Pharmacology.

  1. an antibacterial substance, C 18 H 16 O 7 , derived from lichens of the genus Usnea.

Etymology

Origin of usnic acid

1840–50; < New Latin Usn ( ea ) usnea + -ic

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.