indiscernible Meaning, Definition & Usage

  1. adjective difficult or impossible to perceive or discern
    • an indiscernible increase in temperature
  2. adjective satellite barely able to be perceived
    undetectable; insensible.
    • the transition was almost indiscernible
    • an almost insensible change

WordNet

In`dis*cern"i*ble adjective
Etymology
Pref. in- not + discernible: cf. F. indiscernable.
Definitions
  1. Not to be discerned; imperceptible; not discoverable or visible.
    Secret and indiscernible ways. Jer. Taylor.
    -- In`dis*cern"i*ble*ness, n. -- In`dis*cern"i*bly, adv.

Webster 1913