oölite

Noun

oolite (countable and uncountable, plural oolites)

1. A rock consisting of spherical grains within a mineral cortex accreted around a nucleus, often of quartz grains.
   • 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.2004, Richard Fortey, The Earth, Folio Society, published 2011, page 170
2. (countable, rare) An ooid or oolith.