imperceptibility

== English == === Noun === imperceptibility (uncountable) The state or quality of being imperceptible. === References === William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “imperceptibility”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC. “imperceptibility”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.