Hypertext Webster Gateway: "Tetra"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
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.
From WordNet (r) 1.7 (wn)
tetra
n : brightly colored tropical freshwater fishes
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