personality formation |
The life history associated with the development of individual patterns and of one's individuality.
(05 Mar 2000) |
rosette formation |
The in vitro formation of clusters consisting of a cell (usually a lymphocyte) surrounded by antigenic cells or antigen-bearing particles (usually erythrocytes, which may or may not be coated with antibody or antibody and complement). The rosette-forming cell may be an antibody-forming cell, a memory cell, a T-cell, a cell bearing surface cytophilic antibodies, or a monocyte possessing fc receptors. Rosette formation can be used to identify specific populations of these cells.
(12 Dec 1998) |
rouleaux formation |
The arrangement of red blood cells in fluid blood (or in diluted suspensions) with their biconcave surfaces in apposition, thereby forming groups that resemble stacks of coins.
Synonym: false agglutination, pseudoagglutination.
Origin: Fr. Pl. Of rouleau, a roll
(05 Mar 2000) |
concept formation |
A cognitive process involving the formation of ideas generalised from the knowledge of qualities, aspects, and relations of objects.
(12 Dec 1998) |
heat of formation |
The heat (expressed in calories or joules) absorbed or liberated during the (hypothetical) reaction in which a mole of a compound is formed from the necessary elements, in elemental form.
(05 Mar 2000) |
symptom formation |
An unconscious psychological process by which a repressed impulse is indirectly manifested through a particular symptom, e.g., anxiety, compulsion, depression, hallucination, obsession.
Synonym: symptom formation.
(05 Mar 2000) |
enthalpy of formation |
<chemistry> The enthalpy change when 1 mole of a substance is formed from the elements in their standard states, represented by the symbol Hf.
Synonym: heat of formation.
(09 Jan 1998) |
formation |
1. The act of giving form or shape to anything; a forming; a shaping.
2. The manner in which a thing is formed; structure; construction; conformation; form; as, the peculiar formation of the heart.
3. A substance formed or deposited.
4. <geology> Mineral deposits and rock masses designated with reference to their origin; as, the siliceous formation about geysers; alluvial formations; marine formations. A group of beds of the same age or period; as, the Eocene formation.
5. The arrangement of a body of troops, as in a square, column, etc.
Origin: L. Formatio: cf. F. Formation.
Source: Websters Dictionary
(01 Mar 1998) |
leukodystrophy with diffuse Rosenthal fibre formation |
A metabolic disorder whose onset can be in infancy, adolescence, or adulthood; characterised pathologically by widespread cerebral demyelination with astrocyte and primitive oligodendroglial cell proliferation; refractile Rosenthal fibres result from the degeneration of these proliferating cells; aetiology unknown, but possibly due to a metabolic defect of astrocytes; sex-linked recessive disorder.
(05 Mar 2000) |