Relating to or belonging to a crinoid; composed of crinoid stems or segments.
From 'crino-' (relating to crinoids, sea lilies, from Greek 'krinon', lily) + '-al' (adjectival suffix). Scientific paleontological term.
Crinoids are ancient sea creatures that look like flowers but are actually animals—'encrinal' rocks are literally made of trillions of their fossilized skeletons stacked on top of each other!
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