Plural of glochidium; the larval stage of certain freshwater mussels, characterized by microscopic hooks or barbs.
Latin plural of glochidium (from Greek glochis). Standard scientific Latin pluralization.
Freshwater mussel glochidia are so specialized that each species targets specific fish—it's a 350-million-year-old coevolution arms race between mussels and fish, locked in mutual dependence.
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