The Collaborative International Dictionary of English v.0.48:

Receptive \Re*cep"tive\ (r[-e]*s[e^]p"t[i^]v), a. [Cf. F.
   r['e]ceptif. See Receive.]
   Having the quality of receiving; able or inclined to take in,
   absorb, hold, or contain; receiving or containing; as, a
   receptive mind.
   [1913 Webster]

         Imaginary space is receptive of all bodies. --Glanvill.
   [1913 Webster]

WordNet (r) 3.0 (2006):

receptive
    adj 1: open to arguments, ideas, or change; "receptive to reason
           and the logic of facts"
    2: ready or willing to receive favorably; "receptive to the
       proposals" [syn: receptive, open] [ant: unreceptive]
    3: of a nerve fiber or impulse originating outside and passing
       toward the central nervous system; "sensory neurons" [syn:
       centripetal, receptive, sensory(a)]
    4: able to absorb liquid (not repellent); "the paper is ink-
       receptive"

Moby Thesaurus II by Grady Ward, 1.0:

158 Moby Thesaurus words for "receptive":
   accessible, acquiescent, adaptable, admissible, admissive,
   admissory, agreeable, alacritous, alert, alive to, amenable,
   amiable, apt, ardent, astute, aware, bendable, bending, bright,
   clever, cognizant, compliant, conscious, consenting, content,
   cooperative, cordial, delicate, disposed, docile, ductile, eager,
   educable, elastic, emotionable, enthusiastic, extensible,
   extensile, fabricable, facile, fain, favorable, favorably disposed,
   favorably inclined, fictile, flexible, flexile, flexuous, formable,
   formative, forward, friendly, game, generous, genial, giving,
   gracious, hearty, hospitable, imbibitory, impressible,
   impressionable, impressive, in the mind, in the mood, inclined,
   influenceable, ingestive, instructable, intelligent, interested,
   intromissive, intromittent, invitatory, inviting, keen, liberal,
   like putty, limber, lissome, lithe, lithesome, malleable, minded,
   moldable, motivated, movable, neighborly, open, open-minded,
   openhearted, passible, perceptive, persuadable, persuasible,
   pervious, plastic, pliable, pliant, predisposed, prompt, prone,
   quick, ready, ready and willing, receivable, receiving, receptible,
   recipient, responsive, ripe for instruction, schoolable, sensatory,
   sensible, sensile, sensimotor, sensitive, sensitive to, sensorial,
   sensorimotor, sensory, sensuous, sentient, sequacious, shapable,
   sharp, sib, soft, softhearted, springy, suasible, submissive,
   suggestible, supple, susceptible, susceptive, swayable,
   sympathetic, teachable, tender, tenderhearted,
   thirsty for knowledge, tractable, tractile, trainable, warm,
   warmhearted, weak, welcoming, well-disposed, well-inclined, whippy,
   willed, willing, willinghearted, willowy, yielding, zealous