spatial summation

spatial summation

noun
See under summation (def. 5).

Origin:
1965–70

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Spatial summation is always a great word to know.
So is doohickey. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a gadget; dingus; thingumbob.
Dictionary.com Unabridged

sum·ma·tion

[suh-mey-shuhn]
noun
1.
the act or process of summing.
2.
the result of this; an aggregate or total.
3.
a review or recapitulation of previously stated facts or statements, often with a final conclusion or conclusions drawn from them.
4.
Law. the final arguments of opposing attorneys before a case goes to the jury.
5.
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:
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
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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