Im-păl'pa-ble, a.

[Prefix im, not, and palpable, q. v.; Fr. & Sp. impalpable, It. impalpabile.]

1. Not palpable; not to be felt; incapable of being perceived by touch; not coarse or gross. “Im-palpable powder.” Boyle.
2. Not obviously or readily apprehended by the mind; as, impalpable distinctions.