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thyme (n.)[thyme 词源字典]: plant of the mint family, late 14c., from Old French thym, tym (13c.) and directly from Latin thymum, from Greek thymon, from PIE *dheu- (1), base of words meaning "to rise in a cloud" (see fume (n.)); thus thyme might be the plant "having a strong odor," or it might be related to thyein "burn as a sacrifice," which would indicate the plant was used as incense. Related: Thymic.[thyme etymology, thyme origin, 英语词源]
thymine (n.): nitrogenous base, 1894, from German (Kossel and Neumann, 1893), from thymic acid, from which it was isolated, the acid so called because obtained from the thymus gland. With chemical suffix -ine (2).
thymus (n.): gland near the base of the neck, 1690s, Modern Latin, from Greek thymos "a warty excrescence," used of the gland by Galen, literally "thyme," probably so called because of a fancied resemblance to a bud of thyme (see thyme). Related: Thymic.