any echinoderm of the subclass Ophiuroidea, including brittle stars, basket stars, and others, characterized by elongate arms radiating from the disk.
of or relating to the subclass Ophiuroidea.
Origin of ophiuroid
1885-90; < New LatinOphiuroidea the class, equivalent to Ophiur(a) the type genus (< Greekophíoura, feminine of ophíouros serpent-tailed (ophí(s) snake + -ouros adj. derivative of ourá tail)) + -oidea-oidea