Definition of -oid in US English:

-oid

suffix

  • 1Zoology
    Forming adjectives and nouns denoting an animal belonging to a higher taxon with a name ending in -oidea.

    ‘hominoid’
    ‘percoid’
  • 2Forming adjectives and nouns denoting form or resemblance.

    ‘asteroid’
    ‘rhomboid’

Origin

From modern Latin -oides, from Greek -oeidēs; related to eidos ‘form’.

Pronunciation

-oid

/ɔɪd/