-asis
1.
a suffix occurring in scientific, especially medical, words from Greek:
psoriasis.
Origin
<
Latin
<
Greek
-iā-
verb stem +
-sis
-sis
British Dictionary definitions for
-asis
-asis
suffix
1.
a variant of
-iasis
-iasis
combining form
1.
(in medicine) indicating a diseased condition:
psoriasis
Compare
-osis
(sense 2)
Word Origin
from New Latin, from Greek, suffix of action