oolite

Definitions

1. A rock consisting of spherical grains within a mineral cortex accreted around a nucleus, often of quartz grains.
   countable, uncountable
2. An ooid or oolith.
   countable, rare

Equivalents

Examples

“Here and there are beds of oolites, for example, made of little rounded grains – like⟳ millet seed – that form⟳ only in agitated warm waters, such as you might find⟳ off the Bahamas today.”

CEFR level