Definition of -aceous in English:

-aceous

suffix

  • 1Botany
    Forming adjectives from family names ending in -aceae (such as ericaceous from Ericaceae).

  • 2Geology Biology
    Forming adjectives describing similarity, especially in shape, texture, or colour:

    ‘arenaceous’
    ‘olivaceous’

Origin

From Latin -aceus of the nature of + -ous.

Pronunciation:

-aceous

/ˈeɪʃəs/