Imperceptible
[adj] impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch"
Related Information
Related Terms
atomic, behind the curtain, behind the scenes, camouflaged, concealed, corpuscular, disguised, embryonic, ephemeral, evanescent, faint, fugitive, germinal, granular, hidden, ill-defined, impalpable, imponderable, inappreciable, inaudible, inconsiderable,