/ Thesaurus / F Synonyms of family spirulidae Find synonyms for: Noun1. Spirulidae, family Spirulidae, mollusk familyusage: coextensive with the genus Spirula; included in the order Belemnoidea in some older classificationsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language