'Scolithus' definitions:

Definition of 'Scolithus'

From: GCIDE

Scolithus \Scol"i*thus\ (? or ?), n. [NL., fr. Gr. skw`lhx a worm + li`qos a stone.] (Paleon.) A tubular structure found in Potsdam sandstone, and believed to be the fossil burrow of a marine worm. [1913 Webster]