-aceous

1. 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.

-aceous

suffix forming adjectives

1. relating to, belonging to, having the nature of, or resembling

   herbaceous

   larvaceous

–aceous

1. A suffix used to form adjectives meaning “made of” or “resembling” a particular substance or material, such as silicaceous, containing silicon.

Word History and Origins

Origin of -aceous¹

< Latin -āceus; -ous

Word History and Origins

Origin of -aceous¹

New Latin, from Latin -āceus of a certain kind; related to -āc, -āx, adjectival suffix