‖He′li‐an″thoi″de‐a (?), n. pl. [NL., fr. L. helianthes sunflower + -oid.] (Zoöl.) An order of Anthozoa; the Actinaria.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.