资料来源 : pyDict

不能感知的,不知不觉的,微细的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Imperceptible \Im`per*cep"ti*ble\, a. [Pref. im- not +
   perceptible: cf. F. imperceptible.]
   Not perceptible; not to be apprehended or cognized by the
   souses; not discernible by the mind; not easily apprehended.

         Almost imperceptible to the touch.       --Dryden.

         Its operation is slow, and in some cases almost
         imperceptible.                           --Burke.
   -- {Im`per*cep"ti*ble*ness}, n. -- {Im`per*cep"ti*bly}, adv.

         Their . . . subility and imperceptibleness. --Sir M.
                                                  Hale.

资料来源 : WordNet®

imperceptible
     adj : impossible or difficult to perceive by the mind or senses;
           "an imperceptible drop in temperature"; "an
           imperceptible nod"; "color is unperceivable to the
           touch" [syn: {unperceivable}] [ant: {perceptible}]