From a derivative of γόνυ (gónu, “knee”), ultimately from Proto-Indo-European *ǵónu (“id”). The long ω (ō) is from the regular Doric development of an unattested *γονϝ-ία (*gonw-ía), as the paradigm of *ǵónu shows no lengthened grade (thus precluding a derivation from such an ablaut), while most mathematicians in Greek antiquity (who were most likely responsible for the word's formation) were Pythagorean (and thus wrote in Doric).[1]
γωνία • (gōnía) f
Case / # | Singular | Dual | Plural | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nominative | ἡ γωνίᾱ hē gōníā |
τὼ γωνίᾱ tṑ gōníā |
αἱ γωνίαι hai gōníai | ||||||||||
Genitive | τῆς γωνίᾱς tês gōníās |
τοῖν γωνίαιν toîn gōníain |
τῶν γωνιῶν tôn gōniôn | ||||||||||
Dative | τῇ γωνίᾳ têi gōníāi |
τοῖν γωνίαιν toîn gōníain |
ταῖς γωνίαις taîs gōníais | ||||||||||
Accusative | τὴν γωνίᾱν tḕn gōníān |
τὼ γωνίᾱ tṑ gōníā |
τᾱ̀ς γωνίᾱς tā̀s gōníās | ||||||||||
Vocative | γωνίᾱ gōníā |
γωνίᾱ gōníā |
γωνίαι gōníai | ||||||||||
Notes: |
|
Borrowed from Ancient Greek γωνία (gōnía).
γωνία • (gonía) f (plural γωνίες)