projectio

Latin

Alternative forms

• prōiectīo (standard classical spelling)

Etymology

From prōiciō (“to throw forth”) +‎ -tiō. The spelling with j is a medieval and Neo-Latin convention used to distinguish the consonantal i (/j/).

Pronunciation

• (Classical Latin) IPA^(key): [proːˈjɛk.ti.oː]
• (modern Italianate Ecclesiastical) IPA^(key): [proˈjɛk.t͡si.o]

Noun

prōjectiō f (genitive prōjectiōnis); third declension

1. (geometry, mathematics) projection.

   Prōjectiō orthogōnālis vectōris.

   Orthogonal projection of a vector.

2. stretching out, extension, overhang.

Declension

Third-declension noun.

	singular	plural
nominative	prōjectiō	prōjectiōnēs
genitive	prōjectiōnis	prōjectiōnum
dative	prōjectiōnī	prōjectiōnibus
accusative	prōjectiōnem	prōjectiōnēs
ablative	prōjectiōne	prōjectiōnibus
vocative	prōjectiō	prōjectiōnēs

References

• “proiectio”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “proiectio”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.