ooid

About 0.02 uses per million words.

Meaning

1. noun A small calcium carbonate- or iron-coated grain found on the seafloor.
2. adjective Shaped like an egg; ovoid; ovate.

Similar words

oolite oolith foidolite foid ostracite foidite olistolith pisoid opacite roestone

Often followed by

grainstone sand grainstones shoals formation sands shoal and cortex