bio-, bi-, -bia, -bial, -bian, -bion, -biont, -bius, -biosis, -bium, -biotic, -biotical +
(Greek: life; living, live, alive)
Don’t confuse this element with another bi- which means "two".
The most important things in life are not
things.
—Anonymous
abiotrophic
1. Pertaining to abiotrophy.
2. Describing disease processes presumed to be a result of abiotrophy.
abiotrophy, abiatrophy, abionergy
The progressive loss of vitality of certain tissues or organs leading to disorders or loss of function; applied especially to degenerative hereditary diseases of late onset.
acaustobiolith
A noncombustible rock that is organic or formed by organic accumulation of minerals; the category includes diatomite, radiolarite, phosphorite, and some limestones.
actinobiology
The study of the effects of radiation on living organisms.
active euthanasia
The deliberate putting of someone to death because that person is suffering from a painful and incurable disease and desperately wants to die; mercy killing.
aerobiological
1. A reference to the study of airborne micro-organisms or spores and their distribution; especially, as agents of infection.
2. Relating to that branch of biology which deals with the distribution of living organisms by air, either the exterior, or outdoor air (extramural aerobiology), or the indoor air (intramural aerobiology).
aerobiologist
Someone who studies or specializes in the study of airborne microorganisms or spores.
aerobiont
Either an organism living in air as distinct from water or soil or an organism requiring oxygen.
aerobioscope
An apparatus for collecting and determining the bacterial content of the air.
aerobiosis
1. Growing or occurring only in the presence of molecular oxygen.
2. Living, or existing, only in the presence of air or free oxygen.
3. An environment in which the partial pressure of oxygen is similar to normal atmospheric levels.
4. Life which is sustainable by means of atmospheric oxygen.
aerocele
1. A tumor formed by air filling an adventitious pouch, such as laryngocele and trachecele.
2. Distention of a small natural cavity with gas.
aeroderivative
An aviation propulsion gas turbine (jet engine) used in a non-aviation applications (that is, an electric power plant) to provide shaft power.
agrobiologist
An expert or specialist in agrobiology.
agrobiology, agrobiological, agrobiologic
1. The study of the breeding, nutrition, and growth of crops, especially in relation to soil management.
2. The quantitative science of plant life and plant nutrition.
allobiosphere
That part of the biosphere in which heterotrophic organisms occur but into which organic food material must be transported as primary production does not take place.

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bio- unit, then click this
Bio-Quiz link so you can check your knowledge. You may also try several additional
quizzes in this listing.
Related life, live-word units:
anima-;
-cole;
vita-;
viva-.