Definitions

1. adjective

Resembling or relating to an ooid, a type of sedimentary particle, typically formed from the concentrically layered calcareous shells of certain marine organisms, such as ooliths or oolites.

“The geologist studied the ooidal texture of the ancient limestone formation.”

2. noun

A small, spherical or egg-like mass of sediment, especially one formed by the concentric layers of calcareous shells.

“The ooid sample was carefully collected from the riverbed for further analysis.”