extensity

[ ik-sten-si-tee ]
/ ɪkˈstɛn sɪ ti /

noun

the quality of having extension.
Psychology. the attribute of sensation from which the perception of spatial extension is developed.

Origin of extensity

1825–35; < Latin extēns(us) (see extensive) + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for extensity

extensity

/ (ɪkˈstɛnsɪtɪ) /

noun

psychol that part of sensory perception relating to the spatial aspect of objects
rare the condition of being extensive or extended
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