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Webster 1913 Edition
Hypo
Hy′po
,Noun.
Hypochondria.
[Colloq.]
Hy′po
,Noun.
[Abbrev. from
hyposulphite
.] (Photog.)
Sodium hyposulphite, or thiosulphate, a solution of which is used as a bath to wash out the unchanged silver salts in a picture.
[Colloq.]