ˌ ̷ ̷ ̷ ̷ˈmes ə n(t)s noun
( -s )
Etymology: French, from Latin intumescere + French -ence
1.
a. : an enlarging, swelling, or bubbling up (as under the action of heat)
b. : the state of being swollen : marked enlargement : inflation
2. : something swollen or enlarged (as a tumor) ; specifically : an enlargement resembling a knob or pustule and consisting of a group of abnormally enlarged cells appearing on leaves or other plant parts as a result of physiological disturbances