The Collaborative International Dictionary
Tumefacient
Tumefacient \Tu`me*fa"cient\, a. [L. tumefaciens, -entis, p. pr. of tumefacere to tumefy; tumere to swell + facere to make.] Producing swelling; tumefying.
Wiktionary
tumefacient
a. Producing swelling; tumefying.