RHABDOLITH

Etymology

Noun

rhabdolith (plural rhabdoliths)

A minute calcareous rodlike structure found at both the surface and the bottom of the ocean, supposed by some to be a calcareous alga.

Source: Wiktionary

Rhab"do*lith, n. Etym: [Gr. "ra`bdos a rod + -lith.]

Definition: A minute calcareous rodlike structure found both at the surface and the bottom of the ocean; -- supposed by some to be a calcareous alga.

Source: Webster’s Unabridged Dictionary 1913 Edition