Word:    Find rhymes Find rhymes (advanced) Find near rhymes Find synonyms Find descriptive words Find phrases Find antonyms Find definitions Find related words Find similar sounding words Find similarly spelled words Find homophones Find phrase rhymes Match consonants only Match these letters Find anagrams (unscramble) Definitions of pneumatocyst: noun:   (marine biology) A sac or other structure containing air and used for flotation by a marine organism, chiefly used in reference to those of kelps and siphonophores. (Definitions from Wiktionary) Related words... Descriptive words...   Help  Feedback  Privacy  Terms of Use Copyright © 2023