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3 definitions found
 for CH3
From The Collaborative International Dictionary of English v.0.48 :

  Formyl \For"myl\, n. [Formic + -yl.] (Chem.)
     (a) A univalent radical, H.C:O, regarded as the essential
         residue of formic acid and aldehyde.
     (b) Formerly, the radical methyl, CH3.
         [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Methyl \Meth"yl\, n. [See Methylene.] (Chem.)
     A univalent hydrocarbon radical, CH3-, not existing alone
     but regarded as an essential residue of methane, and
     appearing as a component part of many derivatives; as, methyl
     alcohol, methyl ether, methyl amine, etc. [Formerly written
     also methule, methyle, etc.]
     [1913 Webster]
  
     Methyl alcohol (Chem.), a light, volatile, inflammable
        liquid, CH3.OH, obtained by the distillation of wood,
        and hence called wood alcohol or wood spirit;
        tecnically referred to as methanol; -- called also
        methol, carbinol, etc.
  
     Methyl amine (Chem.), a colorless, inflammable, alkaline
        gas, CH3.NH2, having an ammoniacal, fishy odor. It is
        produced artificially, and also occurs naturally in
        herring brine and other fishy products. It is regarded as
        ammonia in which a third of its hydrogen is replaced by
        methyl, and is a type of the class of substituted
        ammonias.
  
     Methyl ether (Chem.), a light, volatile ether CH3.O.CH3,
        obtained by the etherification of methyl alcohol; --
        called also methyl oxide or dimethyl ether.
  
     Methyl green. (Chem.) See under Green, n.
  
     Methyl orange. (Chem.) See Helianthin.
  
     Methyl violet (Chem.), an artificial dye, consisting of
        certain methyl halogen derivatives of rosaniline.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  molecular formula \mo*lec"u*lar form"u*la\, n. (Chem.)
     An expression representing the composition of elements in a
     chemical substance, commonly consisting of a series of
     letters and numbers comprising the atomic symbols of each
     element present in a compound followed by the number of atoms
     of that element present in one molecule of the substance.
     Thus the molecular formula for common alcohol (ethyl alcohol)
     is C2H6O, meaning that each molecule contains two carbon
     atoms, six hydrogen atoms, and one oxygen atom. The molecular
     formula may be written to provide some indication of the
     actual structure of the molecule, in which case structural
     units may be written separately. Thus, ethyl alcohol can also
     be written as CH3.CH2.OH or CH3-CH2-OH, in which the
     period or dash between functional groups indicates a single
     bond between the principle atoms of each group. This formula
     shows that in ethyl alcohol, the carbon of a methyl group
     ({CH3-) is attached to the carbon of a methylene group
     ({-CH2-), which is attached to the oxygen of a hydroxyl
     group ({-OH). A structural formula is a graphical
     depiction of the relative positions of atoms in a molecule,
     and may be very complicated.
     [PJC]

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