C2H6

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Homology \Ho*mol"o*gy\, n. [Gr. ? agreement. See {Homologous}.]
     1. The quality of being homologous; correspondence; relation;
        as, the homologyof similar polygons.
        [1913 Webster]
  
     2. (Biol.) Correspondence or relation in type of structure in


        contradistinction to similarity of function; as, the
        relation in structure between the leg and arm of a man; or
        that between the arm of a man, the fore leg of a horse,
        the wing of a bird, and the fin of a fish, all these
        organs being modifications of one type of structure.
        [1913 Webster]
  
     Note: Homology indicates genetic relationship, and according
           to Haeckel special homology should be defined in terms
           of identity of embryonic origin. See {Homotypy}, and
           {Homogeny}.
           [1913 Webster]
  
     3. (Chem.) The correspondence or resemblance of substances
        belonging to the same type or series; a similarity of
        composition varying by a small, regular difference, and
        usually attended by a regular variation in physical
        properties; as, there is an homology between methane,
        {CH4}, ethane, {C2H6}, propane, {C3H8}, etc., all members
        of the paraffin series. In an extended sense, the term is
        applied to the relation between chemical elements of the
        same group; as, chlorine, bromine, and iodine are said to
        be in homology with each other. Cf. {Heterology}.
        [1913 Webster]
  
     {General homology} (Biol.), the higher relation which a
        series of parts, or a single part, bears to the
        fundamental or general type on which the group is
        constituted. --Owen.
  
     {Serial homology} (Biol.), representative or repetitive
        relation in the segments of the same organism, -- as in
        the lobster, where the parts follow each other in a
        straight line or series. --Owen. See {Homotypy}.
  
     {Special homology} (Biol.), the correspondence of a part or
        organ with those of a different animal, as determined by
        relative position and connection. --Owen.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  ethane \eth"ane\ ([e^]th"[=a]n), n. [From {Ether}.] (Chem.)
     A gaseous hydrocarbon, {C2H6}, forming a constituent of
     ordinary illuminating gas. It is the second member of the
     paraffin series, and its most important derivatives are
     common alcohol (ethyl alcohol), acetaldehyde, ether, and
     acetic acid. Called also {dimethyl}.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  C2H6
       n : a colorless odorless alkane gas used as fuel [syn: {ethane}]