Added 9 October 2026
prototherian
/ˌpɹoʊtɵˈθɪəɹi.ən/ adjective
adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about prototherian at Wordnik → Where our words come from →
- Belonging or pertaining to the subclass Prototheria.
noun
- Any of the egg-laying mammals of the subclass Prototheria; a monotreme.
Origin
From translingual Prototheria + -an, from Ancient Greek πρωτο- (prōto-, “proto-, first”) + θηρίον (thēríon, “beast”).
From Wiktionary, via Kaikki.org (CC BY-SA)