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单词 nor-
释义

Definition of nor- in English:

nor-

prefix
Chemistry
  • Denoting an organic compound derived from another, in particular by the shortening of a chain or ring by the removal of one methylene group or by the replacement of one or more methyl side chains by hydrogen atoms.

    〔化〕表示“正”,“降”

    noradrenaline

Origin

From nor(mal), originally used to refer to a compound without methyl substituents.

Definition of nor- in US English:

nor-

prefix
Chemistry
  • Denoting an organic compound derived from another, in particular by the shortening of a chain or ring by the removal of one methylene group or by the replacement of one or more methyl side chains by hydrogen atoms.

    〔化〕表示“正”,“降”

    norepinephrine

Origin

From nor(mal), originally used to refer to a compound without methyl substituents.

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更新时间:2025/7/4 16:20:05