Meaning of -OSIS in English

-OSIS

ˈōsə̇s noun suffix

( plural -o·ses ˈōˌsēz ; or -o·sis·es )

Etymology: Middle English, from Latin, from Greek -ōsis, from -ō- (medial vowel characteristic of derivatives of certain verbs) + -sis

1.

a. : action : process : condition

hypn osis

b. : abnormal or diseased condition

leuk osis

2. : increase : formation

leukocyt osis

3. : arrangement

pteryl osis

4.

[New Latin, from Latin]

: disease caused by a (specified) fungus

chytridi osis

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.