allo-, all-

(Greek: different, other, another; divergence; a combining form denoting a condition differing from the normal or a reversal, or referring to "another")

allobiosis (s) (noun), allobioses (pl)
1. The condition of altered reactivity which an organism manifests under changed environmental or physiologic conditions.
2. The changed activity exhibited by an organism when subjected to an altered (another) environment.
3. A form of an element that has isotopic abundances that are different from the naturally occurring form; for example, "depleted" uranium has had most of the uranium-235 removed, and is an allobar of natural uranium.
allobiosphere (s) (noun), allobiospheres (pl)
That part of the earth's surface and surrounding air that is capable of supporting life in which heterotrophic (dependent on other sources for food) organisms occur but into which organic food material must be transported because the primary production does not take place where they are: Most of the occupants of the various allobiospheres usually depend on green plants that include elements of solar energy that have been converted into chemical energy which is food for the various species of animal life.

Another allobiosphere has been discovered at the bottom of the seas where hot springs come up from that part of the Earth that is deep below the surface or on the seafloor where hot springs have animals that are separate from green plants but that depend on bacteria that utilize the energy of chemicals from the hot springs.

Ocean depths are the most extensive and permanent example of the allobiosphere where in great areas there is no light and so there is no active plant life; however, explorers of the depths of the oceans have discovered various animals; such as, worms, prawn-like creatures, and many types of fish that live in these locations.

The ecologist, G. Evelyn Hutchinson, coined the term allobiosphere for these environments, where plant life and its photosynthesis are replaced by environmental extremes of darkness, heat, or cold, but where life continues, life that depends for nourishment from materials that come from other places.

—This information was compiled from the following sources:
"The Allobiosphere",; "Life in the allobiosphere", UK Pubmed Central;
based on excerpts from "Natural Science", by John S. Edwards; 1988.
allocarpy (s) (noun), allocarpies (pl)
The production of fruit after cross-fertilization.
allocate (AL uh kayt") (verb), allocates; allocated; allocating
1. To set aside something for a reason or a purpose: The principal of the school allocated two teachers and three students to plan the end-of-school activities.
2. To distribute something according to a plan: The government agency announced a plan to allocate millions of dollars to purchase food supplies and medications for the storm-hit community.
To assign or to apportion.
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allocation (s) (noun), allocations (pl)
A system, procedure, or process of distributing or sharing by setting something aside.
allocentric (adjective), more allocentric, most allocentric
1. Characterized by or indicating interest that is centered in other people rather than in one's own interests.
2. Having one's thoughts about people or objects outside, or beyond, one's self.
allocheiral, allochiral (s) (noun); allocheirals, allochirals (pl)
A condition in which a sensation or stimulus is perceived at a point on the body that is remote or away from the point that was stimulated.
allocheiria, allochiria (s) (noun); allocheirias, allochirias (pl)
1. Dyschiria in which, if one extremity is stimulated, the sensation is "felt" on the opposite side.
2. A condition associated with a central nervous lesion in which a sensation is referred to a location on the side of the body opposite to the place on which the skin is stimulated.
3. A form of allachesthesia in which the sensation of a stimulus in one limb is referred to the contralateral (opposite side) limb.
4. A condition in which a sensation or stimulus is perceived at a point on the body that is remote from the point that was stimulated and seen in tabes dorsalis and other conditions. Also called: allachesthesia, allesthesia.
Sediment formed by chemical or biochemical precipitation within a depositional basin; includes intraclasts, oolites, fossils, and pellets.
allochemic (adjective), more allochemic, most allochemic
1. Any secondary compound produced by plants as part of their defense mechanism against herbivores; acting either as a toxin or digestibility reducer.
2. A reference to interaction (other than purely nutritional ones) involving chemicals by which organisms of one species affect the growth, health, behavior, or population of those of another species.
allochemical metamorphism
Metamorphism accompanied by addition or removal of material so that the bulk chemical composition of the rock is changed.
allochesthesia, allochaesthesia (s) (noun); allochesthesias, allochaesthesias (pl)
A perception of a stimulus in the limb opposite to the one being stimulated: Brenda watched as Dr. Jenkins pricked her right foot, exclaiming that she felt the allochesthesia in her left foot.
allochezia, allochetia
1. The discharge of nonfecal material from the bowels via the anus.
2. The discharge of feces through an abnormal opening; such as, a fistula (an abnormal communication between two normally unconnected structures, body cavities, or the surface of the body).
A reference to allocheiria, allochiria.
Occurring in two or more communities within a given geographical region.

Inter-related cross references, directly or indirectly, involving word units meaning "another, other, different, alternating, varied, changing": ali-; alter-; allelo-; hetero-; mut-; poikilo-; reciproc-; vari-.