The Collaborative International Dictionary
Rhabdolith
Rhabdolith \Rhab"do*lith\, n. [Gr. "ra`bdos a rod + -lith.] A minute calcareous rodlike structure found both at the surface and the bottom of the ocean; -- supposed by some to be a calcareous alga.
Wiktionary
rhabdolith
n. A minute calcareous rodlike structure found both at the surface and the bottom of the ocean, supposed by some to be a calcareous alga.