Definify.com
Webster 1913 Edition
Sulphurous
Sul′phur-ous
,Adj.
[L.
sulphurosus
, sulfurosus
: cf. F. sulfureux
.] 1.
Of or pertaining to sulphur.
2.
(Chem.)
(a)
Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a lower valence as contrasted with the sulphuric compounds.
(b)
Having the characteristic odor of sulphur dioxide, or of hydrogen sulphide, or of other sulphur compounds.
Webster 1828 Edition
Sulphurous
SUL'PHUROUS
,Adj.