Decuman
Pronunciation : Dec"u*man
Part of Speech : a.
Etymology : [L. decumanus of the tenth, and by metonymy, large, fr. decem ten.]
Definition : Defn: Large; chief; -- applied to an extraordinary billow, supposed by some to be every tenth in order. [R.] Also used substantively. "Such decuman billows." Gauden. "The baffled decuman." Lowell.
Source : Webster's Unabridged Dictionary, 1913