usnic acid

noun
us·​nic acid | \ ˌəs-nik- How to pronounce usnic acid (audio) \

Medical Definition of usnic acid

: a yellow crystalline antibiotic C18H16O7 that is obtained from various lichens (as old-man's beard)

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Cite this Entry

“Usnic acid.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/usnic%20acid. Accessed 29 Oct. 2020.

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