hypo

n. [ 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. ] [ 1913 Webster ]

[ Gr. &unr_; under, beneath; akin to L. 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. [ 1913 Webster ]

2. (Chem.) 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. [ 1913 Webster ]

a. (Anat.) Of or pertaining to a hypoarion. [ 1913 Webster ]

‖n.; pl. Hypoaria [ NL., fr. Gr. "ypo` beneath + &unr_; a little egg.] (Anat.) An oval lobe beneath each of the optic lobes in many fishes; one of the inferior lobes. Owen. [1913 Webster]

n. [ Pref. hypo- + -blast. ] (Biol.) The inner or lower layer of the blastoderm; -- called also endoderm, entoderm, and sometimes hypoderm. See Illust. of Blastoderm, Delamination, and Ectoderm. [ 1913 Webster ]

a. (Biol.) Relating to, or connected with, the hypoblast; as, the hypoic sac. [ 1913 Webster ]

n. [ Gr. &unr_; a throwing under, a suggesting; &unr_; under + &unr_; to throw. ] (Rhet.) A figure in which several things are mentioned that seem to make against the argument, or in favor of the opposite side, each of them being refuted in order. [ 1913 Webster ]

a. [ Pref. hypo- + branchial. ] (Anat.) Pertaining to the segment between the basibranchial and the ceratobranchial in a branchial arch. -- n. A hypobranchial bone or cartilage.