allo-, all-

A form of a chemical element having an atomic weight different from that of the naturally occurring form: An allobar refers to an isotope with a different atomic weight to that of the naturally occurring form of the same element.

1. In biology, an adaption to changes in external or internal conditions: Allobiosis relates to the changed activity exhibited by an organism when subjected to an altered (another) environment.
2. A form of an element that has isotopic abundances that are different from the naturally occurring form: An example of allobiosis is when the, "depleted" uranium has had most of the uranium-235 removed and is an allobar of natural uranium.

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.

The production of fruit after cross-fertilization: Mr Jones was pleased that his first try at allocarpy, or the creation of fruit due to cross-fertilisation, was totally successful.

1. To set something aside 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. © ALL rights are reserved.

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A system, procedure, or process of distributing or sharing by setting something aside: The allocation of the food for the poor will be put into effect the following month.

Characterized by or indicating interest that is centered in other people rather than in one's own interests: Peter was known for his allocentric interests and activities in his town, like helping the poor and creating a graden for blind people.

Referring to a situation 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: When Dr. Smart touched Tom's foot, Tom felt a pain in his right arm instead, and Dr. Smart said he had an allocheiral condition.

1. Dyschiria in which, if one extremity is stimulated, the sensation is "felt" on the opposite side: Allochiria> is 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.

Allochiria is a form of "allachesthesia" in which the sensation of a stimulus in one limb is referred to the contralateral (opposite side) limb.

Allochiria is 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.

In petrology, a bit or very small piece of rock within a carbonate rock: An allochem is a sediment formed by chemical or biochemical precipitation within a depositional basin and includes intraclasts, oolites, fossils, and pellets.

Pertaining to any secondary compound produced by plants as part of their defense mechanism against herbivores and acting either as a toxin or digestibility reducer: Am allochemic interaction (other than purely nutritional ones) involves chemicals by which organisms of one species affect the growth, health, behavior, or population of those of another species.

In petrology, metamorphism accompanied by addition or removal of material: Allochemical metamorphism refers to the process of the alteration of bulk chemical composition of a rock.

A perception of a stimulus in the limb opposite to the one being stimulated: Brenda watched as Dr. Jenkins pricked her right foot, and then exclaimed that she felt the allochesthesia in her left foot.

1. The discharge of nonfecal material from the bowels via the anus: It was certainly strange that the patient had allochezia following an examination of the substances detected in her stool.
2. The discharge of feces through an abnormal opening: Allochezia is known to take place by the way of a fistula, which is an abnormal communication between two normally unconnected structures, body cavities, or the surface of the body.

Relating to the disorder in which a patient responds to a stimulus felt on one side of the body although it wass induced on the opposite side: Dr. Jones told Jane that she had an allochiral condition because her right hand hurt although he only pricked her left hand.