tetracycline
noun
tet·ra·cy·cline
ˌte-trə-ˈsī-ˌklēn
-klən
: a yellow crystalline broad-spectrum antibiotic C22H24N2O8 produced by streptomyces or synthetically
also
: any of several chemically related antibiotics (such as doxycycline)
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Merriam-Webster unabridged
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