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The Collaborative International Dictionary
Exspuition

Exspuition \Ex`spu*i"tion\, n. [L. exspuitio; ex out + spuere to spit: cf. F. exspuition.] A discharge of saliva by spitting. [R.]
--E. Darwin.

Wiktionary
exspuition

n. (context obsolete English) The act of spitting.