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Origin and history of thyroid

thyroid(adj.)

1690s, in anatomy, in reference to both the cartilage and the gland, from Latinized form of Greek thyreoeidēs, literally "shield-shaped" (in khondros thyreoeides "shield-shaped cartilage," used by Galen to describe the "Adam's apple" in the throat), from thyreos "oblong, door-shaped shield" (from thyra "door," from PIE root *dhwer- "door, doorway") + -eides "form, shape" (see -oid). The noun, short for thyroid gland, is recorded from 1849. Combining form is thyro-.

Entries linking to thyroid

1895, from hyper- "over, exceedingly, to excess" + thyroid + -ism.

1823, "gateway to an Egyptian temple," from Greek pylon "gateway," from pylē "gate, wing of a pair of double gates; an entrance, entrance into a country; mountain pass; narrow strait of water," a word of unknown etymology, perhaps a foreign technical term. The usual word for "door" in PIE in Greek took the form thyra (see thyroid). Meaning "tower for guiding aviators" (1909) led to that of "steel tower for high-tension wires" (1923).

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