graptolite Meaning, Definition & Usage
Grap"to*lite noun
Etymology
NL, Graptolithus, from Gr. is engraved, written ( to write) + stone.Definitions
(Paleon.) One of numerous species of slender and delicate fossils, of the genus Graptolites and allied genera, found in the Silurian rocks. They belong to an extinct group (Graptolithina ) supposed to be hydroids.