-aceous, -acea, -aceae, -aceaen, -aceus

(Latin: a suffix; having the quality of, of the nature of, characterized by, belonging to, resembling)

There are hunderds of words that utilize the -aceous suffix which are not shown here; however, the following will present important examples.

A suffix that forms adjectives and is used with technical combinations, especially in biological terms: "pertaining or belonging to, of the nature of, or characterized by; to be full of, to possess abundantly". The suffix -acea usually denotes "orders and classes in zoology" while the suffix -aceae usually denotes "orders and families in botany" and -aceaen is used to denote members of "orders of the animal kingdom".

rosacea, acne rosacea (s) (noun); rosaceas, acne rosaceas (pl)
A chronic skin disease which causes redness over parts of the face; such as, the cheeks and nose, but primarily the forehead, the chin, and the lower half of the nose: "With rosacea, the tiny blood vessels in the areas of the face enlarge (dilate) and become more visible through the skin, characterized by red or rosy colorations like tiny red lines or the appearance of acnelike pimples."

"Increased conditions of acne rosacea can be prevented by avoiding certain foods, alcohol, caffeine, and exposure to sunlight, extremes of temperature, wind, and certain cosmetics as prescribed by a dermatologist."

"In the earlier stages of rosacea, the patient may notice gradual reddening of the skin, often mistaking these changes for acne, sunburn, or dermatitis."

saccharaceous
sanguinaceous (adjective), more sanguinaceous, most sanguinaceous
Descriptive of a blood-red color.
sanquinaceous
Blood-red, sanguine.
saponaceous
Resembling soap; having the qualities of soap, soapy.
saponaceous
1. Of the nature of, or resembling, soap; consisting of, or containing, soap; soapy.
2. Having the consistency of soap; slippery.
saxifragaceous
Schistostegaceae
sebaceous
Pertaining to, of the nature of, or resembling tallow or fat; oily, greasy.
sebaceous, sebaceus
Containing, or pertaining to, sebum, an oily, fatty matter secreted by the sebaceous glands.
semiherbaceous
setaceous
1. Having or covered with protective barbs, quills, spines, thorns, or setae, etc.
2. Bristle-like; bristle-shaped; having bristles; such as, a setaceous moth.
3. Resembling bristles or a bristle: "So many men these days appear with setaceous whiskers."
siphonaceous
Relating to a plant having large tubular, multinucleate cells that lack cross walls.
stellaceous
suprafoliaceous

Also see this closely related -eous suffix unit.