LATIN DICTIONARYLexicon Latīnum

noun · femininethird declension

reāctiō

reāctiō f (genitive reāctiōnis)

Classical[reˈaːk.ti.oː]Ecclesiastical[reˈak.t͡si.o]

Meaning

Medieval LatinNew Latinreaction
New Latinreaction

Declension

declension
form	singular	plural
nominative	reāctiō	reāctiōnēs
genitive	reāctiōnis	reāctiōnum
dative	reāctiōnī	reāctiōnibus
accusative	reāctiōnem	reāctiōnēs
ablative	reāctiōne	reāctiōnibus
vocative	reāctiō	reāctiōnēs

Origins

Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin reāctiō From reagō + -tiō.

Descendants

Catalanreacció
Englishreactionfrom Old French reaction
Frenchréactionfrom Old French reaction
Romanianreacțiefrom Old French reaction
GermanReaktion
Italianreazione
Portuguesereação
Romanianreacțiune
Spanishreacción
Afrikaansreaksiefrom Dutch reactie

Quick answers

What does reāctiō mean in Latin?: reāctiō, a noun, means “reaction; reaction”.
What is the genitive of reāctiō?: The genitive singular is reāctiōnis. reāctiō is feminine, third declension.
How do you pronounce reāctiō?: In classical Latin, [reˈaːk.ti.oː]; in ecclesiastical (church) Latin, [reˈak.t͡si.o].