Definition of bio- in English:

bio-

combining form

  • 1Relating to life.

    ‘biosynthesis’
    1. 1.1 Biological; relating to biology.
      ‘biohazard’
    2. 1.2 Of living beings.
      ‘biogenesis’
    3. 1.3 Relating to or involving the use of toxic biological or biochemical substances as weapons of war.
      ‘bioterrorism’

Origin

From Greek bios ‘(course of) human life’. The sense is extended in modern scientific usage to mean ‘organic life’.

Pronunciation

bio-

/ˈbʌɪəʊ/