nor-


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Related to nor-: NOR flash, NOR gate

nor-

 
a chemical prefix denoting either (a) a compound of normal structure (having an unbranched chain of carbon atoms) that is isomeric with one having a branched chain, or (b) a compound whose chain or ring contains one less methylene (CH2) group than that of its homologue.

nor-

1. Chemical prefix denoting 1) elimination of one methylene group from a chain, the highest permissible locant being used; 2) contraction of a (steroid) ring by one CH2 unit, the locant being the capital letter identifying the ring. Elimination of two methylene groups is denoted by the prefix dinor-; three groups, by trinor-, for example, norleucine.
2. Chemical prefix denoting "normal," that is, unbranched chain of carbon atoms in aliphatic compounds, as opposed to leucine, a branched chain with the same number of carbon atoms.

nor-

chemical prefix denoting (a) a compound of normal structure (having an unbranched chain of carbon atoms) that is isomeric with one having a branched chain, or (b) a compound whose chain or ring contains one less methylene (CH2) group than does that of its homologue.

nor-

Chemical prefix denoting: 1. Elimination of one methylene group from a chain, the highest permissible locant being used. 2. Contraction of a (steroid) ring by one CH2 unit, the locant being the capital letter identifying the ring. Elimination of two methylene groups is denoted by the prefix dinor-; three groups, by trinor-. 3. Chemical prefix denoting "normal," i.e., unbranched chain of carbon atoms in aliphatic compounds, as opposed to branched with the same number of carbon atoms; e.g., norleucine, leucine.

nor-

Chemical prefix denoting: 1. Elimination of one methylene group from a chain, the highest permissible locant being used. 2. Contraction of a (steroid) ring by one CH2 unit. 3. Chemical prefix denoting "normal," i.e., unbranched chain of carbon atoms in aliphatic compounds.

nor-

chemical prefix denoting (1) a compound of normal structure (having an unbranched chain of carbon atoms) that is isomeric with one having a branched chain, or (2) a compound whose chain or ring contains one less methylene (CH2) group than does that of its homolog.