brittle star

or brit·tle·star

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  1. any echinoderm of the class Ophiuroidea, having the body composed of a central, rounded disk from which radiate long, slender, fragile arms.

Origin of brittle star

First recorded in 1835–45
Also called serpent star. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018