spatial summation


See under summation(def 5).

Origin of spatial summation

First recorded in 1965–70

Definition for spatial summation (2 of 2)

[ suh-mey-shuh n ]
/ səˈmeɪ ʃən /


the act or process of summing.
the result of this; an aggregate or total.
a review or recapitulation of previously stated facts or statements, often with a final conclusion or conclusions drawn from them.
Law. the final arguments of opposing attorneys before a case goes to the jury.
Physiology. the arousal of impulses by a rapid succession of stimuli, carried either by separate sensory neurons (spatial summation) or by the same sensory neuron (temporal summation).

Origin of summation

1750–60; < Medieval Latin summātiōn- (stem of summātiō), equivalent to summāt(us) (past participle of summāre to sum; see -ate1) + -iōn- -ion


sum·ma·tion·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for spatial summation

/ (sʌˈmeɪʃən) /


the act or process of determining a sum; addition
the result of such an act or process
a summary
US law the concluding statements made by opposing counsel in a case before a court

Derived forms of summation

summational, adjectivesummative, adjective

Word Origin for summation

C18: from Medieval Latin summātiō, from summāre to total, from Latin summa sum 1
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

Medical definitions for spatial summation

[ sə-māshən ]


The process by which multiple or repeated stimuli can produce a response in a nerve, muscle, or other part that one stimulus alone cannot produce.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.