R
i. Statistics: Correlation coefficient. (Written in italics.)
iv. Mathematics: abbreviation for radius: Half the diameter of a circle.
iii. Entomology: One of a number of longitudinal veins which run parallel to the wing's costal margin. |
r
Statistics: Correlation coefficient. (Written in italics.) |
R
i. Entomology: One of a number of longitudinal veins which run parallel to the wing's costal margin.
ii. Mathematics: Half the diameter of a circle. |
r.p.m.
See also: rev.
Revolutions per minute. |
raboteuse
Machine pour raboter le bois scié, par l'intermédiaire d'un ou de plusieurs porte-outils travaillant tangentiellement, montés de façon variée. |
raça
Deutsch: Rasse
English: race [definition]
Español: raza [definition]
Français: race [definition]
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race
Population qui, au sein d'une espèce, montre une ou plusieurs communes particularités intrinsèques, et est par conséquent distincte des autres populations appartenant à la même espèce, sans que cela soit suffisant pour accéder au niveau d'un taxon distinct. Rem. Quand les caractères distinctifs d'une race sont adaptatifs, le terme race est synonyme d'écotype et la population est une race climatiqu... |
race
a population that exists within a species and exhibits general genetic characteristics discontinuous and distinct from other populations -note when the distinguishing characteristics of a race are adaptive, the term is synonymous with ecotype -see cline, geographic race, line, local seed source, variety
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Source: Dictionary of Forestry (1998) published by the Society of American Fore... |
Race
i. Individuals of the same species or variety that differ in their ability to produce disease in a given host, or that differ in their reaction to insecticides or fungicides.
ii. A genetically, and as a rule geographically, distinct mating group within a species (C. D. Darlington & K. Mather, The elements of genetics, 1949, London, Allen & Unwin). Often used as an alternativ... |
Race non-specific resistance
See also: Resistance
<Race specific resistance> Resistance to all races of a pathogen. The term is essentially synonymous with horizontal resistance and is preferred because it is more obviously descriptive of the condition to which it refers. This form of resistance is commonly, but not necessarily, polygenic and the two terms are not interchangeable. (BSPP) |