biological , (archaic) biologic
1 of or relating to biology
2 (of a detergent) containing enzymes said to be capable of removing stains of organic origin from items to be washed
3 usually pl a drug, such as a vaccine, that is derived from a living organism
1 an inherent periodicity in the physiological processes of living organisms that is not dependent on the periodicity of external factors
2 the hypothetical mechanism responsible for this periodicity, (See also)
n the control of destructive organisms by nonchemical means, such as introducing a natural predator of the pest
n a protective shield impervious to radiation, esp. the thick concrete wall surrounding the core of a nuclear reactor
n the use of living organisms or their toxic products to induce death or incapacity in humans and animals and damage to plant crops, etc., (Abbrev.)
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