Pentathionic

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pentathionic \Pen`ta*thi*on"ic\, a. [Penta- + thionic.] (Chem.)
     Pertaining to, or designating, an acid of sulphur obtained by
     leading hydrogen sulphide into a solution of sulphur dioxide;
     -- so called because it contains five atoms of sulphur.
     [1913 Webster]