Is the word for human ability to laugh something like resibility?

Hi Harryb,
Yes, "risibility" (spelled with an "i") is the ability or tendency to
laugh or to see the humorous absurdity in something.
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Risibility
1. The ability or tendency to laugh.
2.	A sense of the ludicrous or amusing. Often used in the plural.
3.	Laughter; hilarity.
Source: The American HeritageŽ Dictionary of the English Language,
Fourth Edition
http://dictionary.reference.com/search?r=2&q=risibility
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Risibility
Definition	1.	(often pl.) the ability or tendency to laugh or to see
the humorous absurdity in something.
http://www.wordsmyth.net/live/home.php?script=search&matchent=risibility&matchtype=exact
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"Risible comes from Late Latin risibilis, from the past participle of
Latin ridere, "to laugh, to laugh at." The noun form is risibility.
http://dictionary.reference.com/wordoftheday/archive/2003/01/22.html
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Hope this helps!
regards,
jackburton-ga

French connection: "rire" means "to laugh", from which is derived
"souris" meaning "smile": literally, a "sublaugh".