-osis: Meaning and Definition of

-osis

Pronunciation: [key]
  1. a suffix occurring in nouns that denote actions, conditions, or states (hypnosis; leukocytosis; osmosis), esp. disorders or abnormal states (chlorosis; neurofibromatosis; tuberculosis). Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.