The Collaborative International Dictionary
Gerundial
Gerundial \Ge*run"di*al\, a. Pertaining to, or resembling, a gerund; as, a gerundial use.
Wiktionary
gerundial
a. Pertaining to or behaving like a gerund.
WordNet
gerundial
adj. relating to or like a gerund; "the gerundial suffix `-ing'"