GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Tetra- . [Gr. τέτρα-, from τέσαρες, τέτταρες, four. See Four.]
   A combining form or prefix signifying four, as in tetrabasic, tetrapetalous.
   1913 Webster
   (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