Bio- is used at the beginning of nouns and adjectives that refer to life or to the study of living things.
bio-diesel
Bio-diesel is diesel fuel made from biological or natural sources.
bio-warfare
the use of living organisms or their toxic products to induce death or incapacity in humans and animals and damage to plant crops , etc
bio-organism
a dangerous fast-proliferating organism that could be used as the basis of a biological weapon
bio-security
the precautions taken to protect against the spread of lethal or harmful organisms and diseases
bio-terrorism
the use of living organisms and their toxic products to kill or incapacitate , esp as a political weapon
bioweapon
Bioweapons are biological weapons , which involve the use of bacteria or other living organisms in order to destroy other organisms which are harmful to plants and crops .