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late 14c., "that can be touched," from Late Latin palpabilis "that may be touched or felt," from Latin palpare "touch gently, stroke" (see feel (v.)). Figurative sense of "easily perceived, evident" also is from late 14c. Related: Palpably.
palpable pal·pa·ble (pāl'pə-bəl)
Perceptible to touch; capable of being palpated.