Source : Webster's Revised Unabridged Dictionary (1913)

Susceptible \Sus*cep"ti*ble\, a. [F., from L. suscipere,
   susceptum, to take up, to support, undertake, recognize,
   admit; pref. sus (see {Sub-}) + capere to take. See
   {Capable}.]
   1. Capable of admitting anything additional, or any change,
      affection, or influence; readily acted upon; as, a body
      susceptible of color or of alteration.

            It sheds on souls susceptible of light, The glorious
            dawn of our eternal day.              --Young.

   2. Capable of impression; having nice sensibility;
      impressible; tender; sensitive; as, children are more
      susceptible than adults; a man of a susceptible heart.

Source : WordNet®

susceptible
     adj 1: (often followed by `of' or `to') yielding readily to or
            capable of; "susceptible to colds"; "susceptible of
            proof" [ant: {unsusceptible}]
     2: easily impressed emotionally