The Collaborative International Dictionary of English v.0.48:

Prehensile \Pre*hen"sile\, a. [L. prehensus, p. p. of prehendere
   to lay hold of, seize; pre- (equiv. to prae before) + hendere
   (in comp.), akin to E. get: cf. F. pr['e]hensile. See Get,
   and cf. Prison, Prize, n.]
   Adapted to seize or grasp; seizing; grasping; as, the
   prehensile tail of a monkey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

prehensile
    adj 1: adapted for grasping especially by wrapping around an
           object; "a monkey's prehensile tail" [ant:
           nonprehensile]
    2: having a keen intellect; "poets--those gifted strangely
       prehensile men"- A.T.Quiller-Couch
    3: immoderately desirous of acquiring e.g. wealth; "they are
       avaricious and will do anything for money"; "casting covetous
       eyes on his neighbor's fields"; "a grasping old miser";
       "grasping commercialism"; "greedy for money and power"; "grew
       richer and greedier"; "prehensile employers stingy with
       raises for their employees" [syn: avaricious, covetous,
       grabby, grasping, greedy, prehensile]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "prehensile":
   acquisitive, all-knowing, apperceptive, appercipient, apprehending,
   apprehensive, aware, clawed, cognizant, comprehending, conscious,
   dentate, desirous, digital, digitate, digitated, fanged, fingered,
   grabby, grasping, greedy, insightful, intelligent, itchy, jawed,
   knowing, knowledgeable, mindful, omniscient, perceptive,
   percipient, perspicacious, raptorial, sagacious, sensible, shrewd,
   taloned, toothed, understanding, wise