εὐθεῖα

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Ancient Greek

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Pronunciation

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Noun

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εὐθεῖᾰ (eutheîaf (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.

Declension

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Descendants

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  • Latin: euthīa

Adjective

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εὐθεῖᾰ (eutheîa)

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

Further reading

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