WordWeb Online

1. Capable of being perceived; especially capable of being handled, touched or felt
   "felt sudden anger in a palpable wave"; "the air was warm and close--palpable as cotton"; "a palpable lie"; "a barely palpable dust";
   - tangible
    
2. (medicine) can be felt by palpation
   "a palpable tumour"

See also: perceptible

Antonym: impalpable

Encyclopedia: Palpable