-aceous
a suffix with the meanings “resembling, having the nature of,” “made of,” occurring in loanwords from Latin (cretaceous; herbaceous) and forming adjectives in English on the Latin model (ceraceous), especially adjectival correspondents to taxonomic names ending in -acea and -aceae: rosaceous.
Origin of -aceous
< Latin
-āceus; see
-ous
British Dictionary definitions for -aceous
-aceous
suffix forming adjectives
relating to, belonging to, having the nature of, or resembling
herbaceous; larvaceous
Word Origin for -aceous
New Latin, from Latin
-āceus of a certain kind; related to
-āc,
-āx, adjectival suffix
Scientific definitions for -aceous
-aceous
A suffix used to form adjectives meaning made of or resembling a particular substance or material, such as silicaceous, containing silicon.