noun, plural glo·chid·i·a [gloh-kid-ee-uh] /gloʊˈkɪd i ə/.
the larva of a freshwater mussel of the family Unionidae that lives as a temporary parasite in the gills or on other external parts of fishes.
Origin of glochidium
1895–1900; < New Latin < Greek glōch(ís) point of an arrow + -idion diminutive suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -chidia (-ˈkɪdɪə)
a barbed hair, esp among the spore masses of water ferns and on certain other plants
a parasitic larva of certain freshwater mussels that attaches itself to the fins or gills of fish by hooks or suckers
Word Origin for glochidium
C19: from New Latin, from Greek glōkhis projecting point
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012