Fecula \Fec"u*la\, n.; pl. Fecul[AE] [L. faecula burnt tartar or salt of tartar, dim. of faex, faecis, sediment, dregs: cf. F. f['e]cule.]

Any pulverulent matter obtained from plants by simply breaking down the texture, washing with water, and subsidence. Especially:
   (a) The nutritious part of wheat; starch or farina; -- called also amylaceous fecula.
   (b) The green matter of plants; chlorophyll.

Source: Webster's Revised Unabridged Dictionary (1913)