Definify.com
Webster 1913 Edition
Ostracite
Os′tra-cite
,Noun.
(Paleon.)
A fossil oyster.
Webster 1828 Edition
Ostracite
OS'TRACITE
,Noun.
An oyster shell in its fossil state, or a stone formed in the shell, the latter being dissolved. This stone is found in many parts of England, and has been in repute for its efficacy in cases of the gravel.