thyreoides

• thyroīdēs

Borrowed from Ancient Greek θῠρεοειδής (thureoeidḗs, “shield-shaped”), from θῠρεός (thureós, “oblong shield”) +‎ -ειδής (-eidḗs, “-oid, -like”). Doublet of thyreoīdeus.

• (modern Italianate Ecclesiastical) IPA^(key): /ti.re.oˈi.des/, [t̪ireoˈiːd̪es]

thyreoīdēs (neuter thyreoīdes or thyreoīdēs); third-declension one-termination adjective (Greek-type) (New Latin)

1. Shaped like a shield; thyroid.

Third-declension one-termination adjective (Greek-type).

¹It is unknown if Classical Latin preserved (or would have preserved) the shortness of the original Greek short ending.
²It is unknown whether adjectives of this type would use i-stem or consonant-stem endings in Classical Latin: the relevant forms are not attested. Depending on the word, either ending or both may be attested in New Latin.