The Collaborative International Dictionary
Extuberate
Extuberate \Ex*tu"ber*ate\, v. i. [L. extuberatus, p. pr. of
extuberare to swell; ex out + tuber a swelling.]
To swell out. [Obs.]
--Cockeram.
Wiktionary
extuberate
vb. (context obsolete English) To swell out.