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Webster 1913 Edition

Pentathionic

Penˊta-thi-on′ic

,
Adj.
[
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.

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