Meanings
nounefficacity (countable and uncountable, plural efficacities)
plural efficacities
- countableuncountableEfficacy.
Synonyms & antonyms
Also see
Origin
- Middle Frenchefficacité
- Englishefficacity
From Middle French efficacité (whence -acity).
More words from Middle French
Full word history & related roots →Cite this entry
APA
efficacity. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/efficacity
MLA
“efficacity.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/efficacity. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “efficacity,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/efficacity.
Source: efficacity on Wiktionary, CC BY-SA 4.0.