/ Dictionary / Index S sertularian: Meaning and Definition of Find definitions for: ser•tu•lar•i•an Pronunciation: (sûr"choo-lâr'ē-un), [key] — n. Zool. a type of hydroid that forms stiff, feathery colonies in which the cups holding the zooids are sessile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sertularian (Thesaurus) Sertorius serum Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language