What does feculae mean?
Feculae (singular: fecula) are starchy substances separated from plant tissue — typically roots, tubers, and rhizomes such as potatoes, cassava, and arrowroot — through grating, washing, and sedimentation. Once the fibrous matter settles, a dense white starch remains, which can be dried and ground into a fine, pure powder. Historically, fecula was valued both in the kitchen, as a thickener and a gentle food for invalids, and in the apothecary's shop, where it served as a binder for pills and powders. The word derives from Latin faex ('dregs'), the same root behind 'fecal,' which explains why the term can startle modern ears even though it names a clean, edible product. Today it survives mainly in food science, pharmaceutical history, and older manufacturing texts, with 'fecula' preferred over the rare plural form.
nounFeculae are starchy substances extracted from plant material, especially roots, tubers, and rhizomes, by washing, grating, and settling; the singular form is 'fecula'. The term is used chiefly in food science, pharmacy, and historical texts on nutrition and manufacturing.
- Starch obtained from plant material such as potatoes, arrowroot, or other roots and tubers by grating and settling, used as food thickener or in pharmacy.
"Traditional arrowroot production yields fine feculae prized for their purity and digestibility."
"The pharmacist compounded the pill using wheat fecula as an inert binding agent."
"In the factory's settling vats, the potato fecula slowly sank to the bottom, ready to be dried and milled into fine white powder."
As a Latin-derived noun, 'fecula' takes the Latinate plural 'feculae', though the English-style 'feculas' also occurs; in practice the singular is much more common than either plural.
"The laboratory catalogued several distinct feculae, including those of potato, wheat, and maranta."
Despite sounding unpleasantly close to a certain bodily word, fecula is actually the pristine starch settled out of grated potatoes and arrowroot — the two share nothing but a Latin ancestor meaning 'dregs.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of feculae
Fecula comes from the New Latin 'fecula', a diminutive formed on Latin 'faex' (genitive 'faecis'), meaning 'dregs' or 'sediment' — the residue that settles at the bottom of a liquid. The name reflects the method of extraction: the starch literally settles out of the wash water like dregs. English adopted the term in the late 17th or early 18th century, alongside related words from the same root such as 'fecal', 'feculent', and 'defecate' (which originally meant to purify a liquid by clearing away its dregs).
Related word forms
How feculae is actually used
The plural 'feculae' is uncommon; the singular 'fecula' is far more frequent. The word belongs to technical registers — food science, pharmaceutical history, and older trade literature — and would sound out of place in everyday conversation. It carries no emotional connotation, though its sound may mislead modern readers.
Easily confused with feculae
Though both derive from the same Latin root, 'feces' means bodily waste matter, while 'fecula' refers to a purified plant starch used in cooking and industry.