adj. 25B6; adjective
an almost indiscernible change : UNNOTICEABLE, imperceptible, invisible, hidden, undetectable, indistinguishable, inappreciable; tiny, minute, minuscule, microscopic, infinitesimal, negligible, inconsequential.
an indiscernible shape : INDISTINCT, nebulous, unclear, fuzzy, obscure, vague, indefinite, amorphous, shadowy, dim, hard to make out.
distinct.