The Collaborative International Dictionary
Invocating
Invocate \In"vo*cate\, v. t. [imp. & p. p. Invocated; p. pr. & vb. n. Invocating.] [L. invocatus, p. p. of invocare. See Invoke.] To invoke; to call on, or for, in supplication; to implore.
If Dagon be thy god,
Go to his temple, invocate his aid.
--Milton.
Wiktionary
invocating
vb. (present participle of invocate English)