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

  Penta- \Pen"ta-\, pref. [Gr. penta-, a later combining form of
     pe`nte five. See Five.]
     1. A combining form denoting five; as, pentacapsular;
        [1913 Webster]
     2. (Chem.) Denoting the degree of five, either as regards
        quality, property, or composition; as, pentasulphide,
        containing five sulfur atoms; pentoxide, containing five
        oxygen atoms, etc. Also used adjectively.
        [1913 Webster]

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