HYPOED

HYPO

Hy"po-. Etym: [Gr. sub. See Sub-.]

1. A prefix signifying a less quantity, or a low state or degree, of that denoted by the word with which it is joined, or position under or beneath.

2. (Chem.)

Definition: A prefix denoting that the element to the name of which it is prefixed enters with a low valence, or in a low state of oxidization, usually the lowest, into the compounds indicated; as, hyposulphurous acid.

Hy"po, n.

Definition: Hypochondria. [Colloq.]

Hy"po, n. Etym: [Abbrev. from hyposulphite.] (Photog.)

Definition: Sodium hyposulphite, or thiosulphate, a solution of which is used as a bath to wash out the unchanged silver salts in a picture. [Colloq.]

Source: Webster’s Unabridged Dictionary 1913 Edition