Meaning of unionid in English:

unionid

Pronunciation /ˈjuːnɪənɪd/

noun

Zoology
  • A bivalve mollusc of the family Unionidae; a unio.

adjective

Zoology
  • Designating molluscs of the family Unionidae; relating to or characteristic of this family.

Origin

Mid 19th century; earliest use found in Philip Carpenter (1819–1877), social reformer and conchologist. From scientific Latin Unionidae, family name from Unio unio + -idae, with insertion of -n- after classical Latin ūniōn-, ūniō, etymon of the first element.