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• -aceous
  -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.
• –aceous
  –aceous

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

-aceous

American  

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.

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-aceous British  

suffix

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

   herbaceous

   larvaceous

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–aceous Scientific  

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

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Etymology

Origin of -aceous

< Latin -āceus; see -ous