The Collaborative International Dictionary of English v.0.48:

Sputation \Spu*ta"tion\ (sp[-u]*t[=a]"sh[u^]n), n. [L. sputare
   to spit, v. intens. fr. spuere to spit: cf. F. sputation.]
   The act of spitting; expectoration. --Harvey.
   [1913 Webster]