Etymology

unionoid

U1N1I1O1N1O1I1D2

Today it means: Any member of the family Unionidae or its order Unionida of freshwater mussels. Full definition →

taxonomic name Unio ← Classical Latin ūniō
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The story

  1. Classical Latin · derived fromūniō
  2. taxonomic name · derived fromUnio
  3. English todayunionoid

From taxonomic name Unio (with insertion of -n- after its etymon, Classical Latin ūniō (stem ūniōn-)) + -oid. Compare earlier unionid and taxonomic name Unionioda.

Words from the same roots

taxonomic nameUnio all →

unioniform

Classical Latinūniō all →

unioniform

Etymology from Wiktionary, CC BY-SA 4.0.