Definify.com
Webster 1913 Edition
Lysis
‖
Ly′sis
(lī′sĭs)
, Noun.
[NL., fr. Gr.
λύσις
.] (Med.)
The resolution or favorable termination of a disease, coming on gradually and not marked by abrupt change.
☞ It is usually contrasted with crisis, in which the improvement is sudden and marked; as, pneumonia ends by crisis, typhoid fever by lysis.