-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".

margaritaceous
mucoraceous
Related to, or encompassed by, the the fungal family, Mucoraceae (a family of gungi, some of which are causal agents of mucormycosis, a serious fungus infection occurring most commonly in the lining of the nose and surrounding sinuses; and otomycosis, inflammation of the external ear, usually caused by a bacteria or fungus).
musaceous
oleaceous
orchidacean
One who devotes himself/herself to the cultivation of orchids (flowers); an orchid (flower) fancier.
orchidaceous
Resembling an orchid (flower) in some way, especially in being showy.
ostraceous
papilionaceous
1. Of or pertaining to a butterfly.
2. Belonging to the Papilionaceae family whose plants have petals in the form of a butterfly, mostly legumes, such as peas and beans.
papyraceous
Of the consistence or thinness of paper; of the nature of paper; made of or resembling paper; papery.
philorchidaceous
pilosebaceous
1. A reference to the unit consisting of a hair follicle and a sebaceous gland.
2. Relating to the hair follicles and sebaceous glands.
plumacious
A feather-like structure.
poaceous
In botany, having the nature of meadow grass; belonging to meadow grass.
pomaceous
pseudofoliaceous

Also see this closely related -eous suffix unit.