‖Brach′i‐o‐la″ri‐a (�), n. pl. [NL., fr. L. brachiolum (bracch-), dim. of brachium (bracch-) arm.] (Zoöl.) A peculiar early larval stage of certain starfishes, having a bilateral structure, and swimming by means of bands of vibrating cilia.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.