The Collaborative International Dictionary of English v.0.48:

Feculent \Fec"u*lent\, a. [L. faeculentus, fr. faecula: cf. F.
   f['e]culent. See Fecula.]
   Foul with extraneous or impure substances; abounding with
   sediment or excrementitious matter; muddy; thick; turbid.
   [1913 Webster]

         Both his hands most filthy feculent.     --Spenser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

feculent
    adj 1: foul with waste matter