Home › Words › E › effectrixeffectrixeffectrix means an efficient cause.Among words judged in Lexicurio's Arena, effectrix ranks #2,160 of 42,762 for Qualifying.EtymologyLearned borrowing from Latin effectrīx. First attested in 1583. By surface analysis, effect + -trix.nounAn efficient cause.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.causer 59% match — someone or something that causes or produces an effect. vs effectrix →effection 58% match — Creation; a doing. vs effectrix →effecting 58% match — Causative, effective. vs effectrix →causee 57% match — The agent of the caused event in a causative construction. vs effectrix →effectatious 57% match — Effective; efficacious. vs effectrix →cause 56% match — The source of, or reason for, an event or action; that which produces or effects a result. vs effectrix →causality 56% match — The agency of a cause; the action or power of a cause, in producing its effect. vs effectrix →causation 56% match — The act of causing. vs effectrix →