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See Pituitary body, under Pituitary.

The third lateral plate in the plastron of turtles; -- called also hyposternum.

An accessory plume arising from the posterior side of the stem of the contour feathers of many birds; -- called also aftershaft. See Illust. of Feather.

One of the barbs of the hypoptilum, or aftershaft of a feather. See Feather.

The stem of an aftershaft or hypoptilum. [Written also hyporachis.]

Beneath the endoskeleton; hypaxial; as, the hyposkeletal muscles; -- opposed to episkeletal.

A deformity of the penis, in which the urethra opens upon its under surface.

That which forms the basis of anything; underlying principle; a concept or mental entity conceived or treated as an existing being or thing.

To make into a distinct substance; to conceive or treat as an existing being; to hypostatize. [R.] The pressed Newtonians . . . refused to hypostasize the law of gravitation into an ether. Coleridge.

Relating to hypostasis, or substance; hence, constitutive, or elementary. The grand doctrine of the chymists, touching their three hypostatical principles. Boyle.

In a hypostatic manner.

or regarded as, a separate and distinct substance. Looked upon both species and genera as hypostatized universals. Pop. Sci. Monthly.

See Hypoplastron.

The lower lip of trilobites, crustaceans, etc.

The act of a patient turning himself.

Resting upon columns; constructed by means of columns; -- especially applied to the great hall at Karnak.

A salt of hyposulphuric acid.

A salt of what was formerly called hyposulphurous acid; a thiosulphate. [Obs.]

or containing, sulphur in a lower state of oxidation than in the sulphuric compounds; as, hyposulphuric acid. Hyposulphuric acid, an acid, H2S2O6, obtained by the action of manganese dioxide on sulphur dioxide, and known only in a watery solution and in its salts; -- called also dithionic acid. See Dithionic.…

Pertaining to, or containing, sulphur, all, or a part, in a low state of oxidation. Hyposulphurous acid. (a) Thiosulphuric acid. [Obs.] (b) An acid, H2SO2, obtained by the reduction of sulphurous acid. It is not obtained in the free state, but in an orange-yellow water solution, which is a strong reducing and bleaching…