hyolithid

[ hahy-ol-i-thid ]

noun

1. any invertebrate of the extinct genus Hyolithes, most common in the Cambrian Period, having a limy, univalve shell, and thought to be related to the pteropods.

adjective

1. belonging or pertaining to Hyolithes.

Word History and Origins

Origin of hyolithid¹

< New Latin Hyolith ( es ) ( hyoid, -lith ) + -id ²