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See also: rettō and retto-



  • IPA(key): /ˈrɛtːo/, [ˈr̺ɛt̪.t̪o]
  • Hyphenation: rèt‧to

Etymology 1[edit]

From Latin rēctus, ultimately from Proto-Indo-European *h₃reǵtós (straightened, right).


retto (feminine singular retta, masculine plural retti, feminine plural rette)

  1. (obsolete, literally) straight
    Synonyms: diritto, dritto
    Antonyms: inclinato, piegato, sbilenco, storto, torto (uncommon)
  2. (archaic, figuratively) honest, upright
    Synonyms: corretto, giusto, onesto, virtuoso, probo (dated)
    Antonyms: disonesto, ingiusto, scorretto, truffaldino (dated)
  3. (archaic, figuratively) righteous
    Synonyms: corretto, giusto, probo (dated)
    Antonyms: abietto, corrotto, ingiusto, malvagio
  4. (geometry) right (of an angle); straight (of a line)
    • 1321, Dante Alighieri, La divina commedia: Paradiso, Le Monnier (2002), Canto XIII, p. 236, vv. 100-102:
      «[...] non si est dare primum motum esse, ¶ o se del mezzo cerchio far si puote ¶ trïangol sì ch'un retto non avesse. [...]»
      «[...] not [to know] if the being of a prime mover is acknowledgeable, ¶ or if in semicircle can be made ¶ triangle so that it have no right [angle]. [...]»
  5. (anatomy) rectus
  6. (grammar, of a case) direct
Derived terms[edit]
Related terms[edit]


retto m (feminine singular retta, masculine plural retti, feminine plural rette)

  1. past participle of reggere

Etymology 2[edit]

Ellipsis of intestino retto, from Latin rēctum intestīnum (literally straight intestine).


retto m (plural retti) (anatomy)

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  1. rectum
Derived terms[edit]