- aff. a suffix occurring in nouns that denote actions, conditions, or states (hypnosis; osmosis), esp. disorders or abnormal states (neurofibromatosis; tuberculosis)Compare -otic•Etymology: on the model of Gk borrowings ending in Gk -ōsis, derived orig. from verbs ending in the formative -o- (-ō- in n. derivatives), with the suffix -sis -sis
From formal English to slang. 2014.