1. Existing by nature and without artificial aid
   "one of the 93 naturally occurring chemical elements"

See also: present

• bacteriacide
• bacteriaemia
• bacterial
• bacterial plaque
• bacterial toxin
• bacterially
• bactericidal
• bactericide
• bacteriemia
• bacteriochlorophyll
• bacterioid
• bacterioidal
• bacteriologic
• bacteriological
• bacteriological warfare
• bacteriologist
• bacteriology
• bacteriolysis
• bacteriolytic
• bacteriophage
• bacteriophagic
• bacteriophagous
• bacteriostasis
• bacteriostat
• bacteriostatic