εὐθεῖα

Ancient Greek

Pronunciation
 

Noun

εὐθεῖᾰ • (eutheîa) f (genitive εὐθείᾱς); first declension

  1. (grammar) Ellipsis of εὐθεῖα πτῶσις (eutheîa ptôsis, “nominative case”, literally “straight case”).
  2. (geometry) Ellipsis of εὐθεῖα γραμμή (eutheîa grammḗ, “straight line”).
    • 350 BCE – 250 BCE, Euclid, Elements 1:
      διάμετρος δὲ τοῦ κύκλου ἐστὶν εὐθεῖά τις διὰ τοῦ κέντρου ἠγμένη καὶ περατουμένη ἐφ᾽ ἑκάτερα τὰ μέρη ὑπὸ τῆς τοῦ κύκλου περιφερείας, ἥτις καὶ δίχα τέμνει τὸν κύκλον.
      diámetros dè toû kúklou estìn eutheîá tis dià toû kéntrou ēgménē kaì peratouménē eph᾽ hekátera tà mérē hupò tês toû kúklou periphereías, hḗtis kaì díkha témnei tòn kúklon.

Declension
First declension of ἡ εὐθεῖᾰ; τῆς εὐθείᾱς (Attic)
Case / # Singular Dual Plural
Nominative ἡ εὐθεῖᾰ
hē eutheîa		 τὼ εὐθείᾱ
tṑ eutheíā		 αἱ εὐθεῖαι
hai eutheîai
Genitive τῆς εὐθείᾱς
tês eutheíās		 τοῖν εὐθείαιν
toîn eutheíain		 τῶν εὐθειῶν
tôn eutheiôn
Dative τῇ εὐθείᾳ
têi eutheíāi		 τοῖν εὐθείαιν
toîn eutheíain		 ταῖς εὐθείαις
taîs eutheíais
Accusative τὴν εὐθεῖᾰν
tḕn eutheîan		 τὼ εὐθείᾱ
tṑ eutheíā		 τᾱ̀ς εὐθείᾱς
tā̀s eutheíās
Vocative εὐθεῖᾰ
eutheîa		 εὐθείᾱ
eutheíā		 εὐθεῖαι
eutheîai
Notes:
  • This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.

Descendants
  • → Latin: euthīa

Adjective

εὐθεῖᾰ • (eutheîa)

  1. feminine nominative/vocative singular of εὐθύς (euthús)

Further reading
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