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(). [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. スポンサード リンク
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