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2 definitions found
 for N2
From The Collaborative International Dictionary of English v.0.48 :

  Nitrogen \Ni`tro*gen\ (n[imac]"tr[-o]*j[e^]n), n. [L. nitrum
     natron + -gen: cf. F. nitrog[`e]ne. See Niter.] (Chem.)
     A colorless nonmetallic element of atomic number 7, tasteless
     and odorless, comprising four fifths of the atmosphere by
     volume in the form of molecular nitrogen ({N2). It is
     chemically very inert in the free state, and as such is
     incapable of supporting life (hence the name azote still
     used by French chemists); but it forms many important
     compounds, such as ammonia, nitric acid, the cyanides, etc,
     and is a constituent of all organized living tissues, animal
     or vegetable. Symbol N. Atomic weight 14.007. It was formerly
     regarded as a permanent noncondensible gas, but was liquefied
     in 1877 by Cailletet of Paris, and Pictet of Geneva, and
     boils at -195.8 [deg] C at atmospheric pressure. Liquid
     nitrogen is used as a refrigerant to store delicate
     materials, such as bacteria, cells, and other biological
     [1913 Webster +PJC]

From The Collaborative International Dictionary of English v.0.48 :

  Chromophore \Chro"mo*phore\, n. [Gr. ? color + fe`rein to bear.]
     Any chemical group or residue (as NO2; N2; or O2) which
     imparts some decided color to the compound of which it is an
     [1913 Webster]

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