levigation

from The Collaborative International Dictionary of English v.0.48

Levigation \Lev`i*ga"tion\ (l[e^]v`[i^]*g[=a]"sh[u^]n), n. [L.
   levigatio a smoothing: cf. F. l['e]vigation.]
   The act or operation of levigating.
   [1913 Webster]