The Collaborative International Dictionary of English v.0.48:
libidinal \libidinal\ adj. Of or pertaining to the libido; caused by libido; as, libidinal gratification; libidinal impulses. [WordNet 1.5]WordNet (r) 3.0 (2006):
libidinal adj 1: belonging to the libido; "libidinal impulses"; "libidinal gratification"