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 opsonin: noun:   an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes Related words... Descriptive words...   Help  Feedback  Privacy  Terms of Use Copyright © 2023