reactio

Latin

Etymology

From re- +‎ āctiō; compare reagō.

Noun

reāctiō f (genitive reāctiōnis); third declension

1. (Medieval Latin, New Latin) reaction
2. (New Latin, physics, chemistry) reaction

Declension

Third-declension noun.

Case	Singular	Plural
Nominative	reāctiō	reāctiōnēs
Genitive	reāctiōnis	reāctiōnum
Dative	reāctiōnī	reāctiōnibus
Accusative	reāctiōnem	reāctiōnēs
Ablative	reāctiōne	reāctiōnibus
Vocative	reāctiō	reāctiōnēs

Descendants

• → Catalan: reacció
• → English: reaction
• → French: réaction
• → German: Reaktion
• → Italian: reazione
• → Portuguese: reação
• → Russian: реакция (reakcija)
• → Spanish: reacción