[ im-per-sep-tuh-buhl ]
/ ˌɪm pərˈsɛp tə bəl /
very slight, gradual, or subtle: the imperceptible slope of the road.
not perceptible; not perceived by or affecting the senses.
something not capable of being perceived by the senses: metaphysical speculation about imperceptibles.
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Origin of imperceptible
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for imperceptibility
/ (ˌɪmpəˈsɛptɪbəl) /
too slight, subtle, gradual, etc, to be perceived
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
early 15c., from French imperceptible (early 15c.), from Medieval Latin imperceptibilis, from assimilated form of in- "not, opposite of" (see in- (1)) + perceptibilis (see perceptible). Related: Imperceptibly. OED marks imperceivable as "Now rare."
Online Etymology Dictionary, © 2010 Douglas Harper