LATIN DICTIONARYLexicon Latīnum
noun · femininethird declension

additiō

additiō f (genitive additiōnis)
Classical[adˈdɪ.ti.oː]Ecclesiastical[adˈdit.t͡si.o]

Meaning

  1. alsoaddition
    Additio est numeri vel numerorum aggregatio, ut videatur summa excrescens.Addition is the aggregation of one or more numbers, such that the growing total may be seen.c. 1230, Johannes de Sacrobosco, “De Arte Numerandi”, in Rara Mathematica, published 1841, page 5:

Declension

declension
formsingularplural
nominativeadditiōadditiōnēs
genitiveadditiōnisadditiōnum
dativeadditiōnīadditiōnibus
accusativeadditiōnemadditiōnēs
ablativeadditiōneadditiōnibus
vocativeadditiōadditiōnēs

addĭtĭo, ōnis, f. id.,
I. an adding to, addition: figurarum additio et abjectio, Quint. 9, 3, 18: Sic corpori fit additio, Cael. Aur. Acut. 2, 37; Prisc. p. 978 P.

Origins

  1. Proto-Indo-European*h₂éd
  2. Proto-Italic*ad
  3. Proto-Italic*ad-
  4. Latinadditiō

Proto-Indo-European *dʰeh₁- Proto-Indo-European *dʰéh₁tder. Proto-Italic *-ðō Latin -dō Latin addō Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin additiō From addō (“to put, place, lay”) + -tiō.

Descendants
  • Catalanaddició
  • Frenchaddition
  • Englishadditionfrom French addition
  • Italianaddizione
  • Occitanaddicion
  • Portugueseadição
  • Romanianadițiune
  • Romanianadiție
  • Spanishadición
  • Galicianadición

Quick answers

What does additiō mean in Latin?
additiō, a noun, means “addition”.
What is the genitive of additiō?
The genitive singular is additiōnis. additiō is feminine, third declension.
How do you pronounce additiō?
In classical Latin, [adˈdɪ.ti.oː]; in ecclesiastical (church) Latin, [adˈdit.t͡si.o].
Where does additiō come from?
Proto-Indo-European *h₂éd → Proto-Italic *ad → Proto-Italic *ad- → Latin additiō.