different between tetracycline vs tetracycle

English

From tetracyclic +? -ine.

tetracycline (countable and uncountable, plural tetracyclines) (abbreviated tet)

(pharmacology, uncountable) A yellow crystalline broad-spectrum antibiotic C₂₂H₂₄N₂O₈ produced by streptomyces or synthetically.
(pharmacology, countable) Any of a large group of antibiotics with the same general structure derived from tetracene with many hydroxyl and other groups.

“tetracycline”, in Lexico, Dictionary.com; Oxford University Press, 2019–present.
“tetracycline”, in Merriam–Webster Online Dictionary, (Please provide a date or year).

From Ancient Greek ??????????? (tetrákuklos, “four-wheeled”), equivalent to tetra- +? cycle.

tetracycle (plural tetracycles)

(organic chemistry) Any organic compound, containing four rings, related to tetracycline

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