-osis

noun suffix
plural -oses or -osises

Definition of -osis

1a : action : process : condition hypnosis
b : abnormal or diseased condition leukosis
2 : increase : formation leukocytosis

History and Etymology for -osis

New Latin, from Greek -ōsis, from -ō- (stem of causative verbs in -oun) + -sis

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