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.
- glo·chid·i·al, adjective
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British Dictionary definitions for glochidium
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
- glochidiate, adjective
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