Definition of -cide in US English:

-cide

combining form

  • 1Denoting a person or substance that kills.

    ‘insecticide’
    ‘regicide’
  • 2Denoting an act of killing.

    ‘suicide’
    ‘homicide’

Origin

Via French; -cide (sense 1) from Latin -cida; -cide (sense 2) from Latin -cidium, both from caedere ‘kill’.

Pronunciation

-cide

/sʌɪd/