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1 definition found
 for Tetra-
From The Collaborative International Dictionary of English v.0.48 :

  Tetra- \Tet"ra-\ [Gr. te`tra-, from te`sares, te`ttares, four.
     See Four.]
     1. A combining form or prefix signifying four, as in
        tetrabasic, tetrapetalous.
        [1913 Webster]
     2. (Chem.) A combining form (also used adjectively) denoting
        four proportional or combining parts of the substance or
        ingredient denoted by the term to which it is prefixed, as
        in tetra-chloride, tetroxide.
        [1913 Webster]

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