Pronunciation: (glō-kid'ē-um), [key]
—pl. -chid•i•aPronunciation: (-kid'ē-u). [key]
2. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.