ˈspī(ˌ)ō noun
Usage: capitalized
Etymology: New Latin Spion-, Spio, perhaps from Latin Spio, one of the Nereids, from Greek Speiō
: a widely distributed genus (the type of the family Spionidae) of small burrowing marine polychaete worms without tentacles or palps but with enlarged dorsal cirri acting as gills