Englishfor English speakers
norm
Noun
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A norm is the usual situation, amount, level, etc.
CDs are dying out and MP3s are becoming the norm.
His income is slightly above the norm for someone in his position.
Many teens find it very important to conform to group norms.
preserving
noun
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preservation
mapping
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noun
(genetics) the process of locating genes on a chromosome
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noun
(= function)
(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)