sphaeroma

\\sfə̇ˈrōmə\ noun

Etymology: New Latin, from Greek sphairōma something made round, from sphairoun to make round, from sphaira ball, sphere — more at sphere

1. capitalized : a genus (the type of the family Sphaeromidae) of marine isopod crustaceans having broad oval bodies that can sometimes be rolled into a ball, an abdomen of two segments, and well developed antennae and including destructive borers of pilings and other timbers — see rock-boring isopod

2. -s : any isopod of the genus Sphaeroma