The Collaborative International Dictionary
Irrorating
Irrorate \Ir"ro*rate\, v. t. [imp. & p. p. Irrorated; p. pr. & vb. n. Irrorating.] [L. irroratus, p. p. of irrorare to bedew; pref. ir- in + ros, roris, dew.] To sprinkle or moisten with dew; to bedew. [Obs.]
Wiktionary
irrorating
vb. (present participle of irrorate English)