Added 10 October 2026
unionoid
noun
Latin root: ūniō Wiktionary
noun Definition from Wiktionary (CC BY-SA). More about unionoid at Wordnik → Where our words come from →
adjective
- Relating to, resembling or characteristic of the family Unionidae or its order Unionida of freshwater mussels.
Origin
From taxonomic name Unio (with insertion of -n- after its etymon, Classical Latin ūniō (stem ūniōn-)) + -oid. Compare earlier unionid and taxonomic name Unionioda.
From Wiktionary, via Kaikki.org (CC BY-SA)