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Webster 1913 Edition
Phosphorous
Phos′phor-ous
(fŏs′fŏr-ŭs)
, Adj.
[Cf. F.
phosphoreux
.] (Chem.)
Of or pertaining to phosphorus; resembling or containing phosphorus; specifically, designating those compounds in which phosphorus has a lower valence as contrasted with
phosphoric
compounds; as,
. phosphorous
acid, H3PO3
Webster 1828 Edition
Phosphorous
PHOS'PHOROUS
,Adj.