1. Tested and proved useful or correct
   - tested, tried

See also: proved, proven

• biochemistry
• biochip
• bioclimatic
• bioclimatology
• biodata
• biodefence
• biodefense
• biodegradable
• biodegradable pollution
• biodegradation
• biodegrade
• biodiesel
• biodiversity
• biodynamics
• bioelectric
• bioelectricity
• bioengineer
• bioengineering
• bioethics
• biofeedback
• bioflavinoid
• bioflavonoid
• biofuel
• biogas
• biogenesis