The Collaborative International Dictionary
Extumescence
Extumescence \Ex`tu*mes"cence\, n. [L. ex. + tumescens, p. pr.
of tumescere, incho. fr. tumere to swell: cf. F.
extumescence.]
A swelling or rising. [R.]
--Cotgrave.
Wiktionary
extumescence
n. A swelling or rise.