Hypostasis, hī-pos′ta-sis, n. a substance: the essence or real personal subsistence or substance of each of the three divisions of the Godhead.—adjs. Hypostat′ic, -al.—adv. Hypostat′ically.—v.t. Hypos′tatīse. [L.,—Gr. hypostasishyphistēmihypo, under, histēmi, I make to stand.]

Hypostrophe, hī-pos′tro-fe, n. return of a disease, relapse: (rhet.) use of insertion or parenthesis.

Hypostyle, hī′po-stīl, adj. (archit.) having the roof supported by pillars. [Gr. hypo, under, stylos, a pillar.]

Hyposulphurous, hī-po-sul′fer-us, adj. next in a series below sulphurous.—Also Hyposulphū′ric.

Hypotaxis, hī-po-tak′sis, n. (gram.) dependent construction—opp. to Parataxis.—adj. Hypotac′tic.

Hypotenuse, hī-pot′en-ūs, or hip-, Hypothenuse, hī-poth′en-ūs, n. the side of a right-angled triangle opposite to the right angle. [Fr.,—Gr. hypoteinousa (grammē), lit. (a line) 'which stretches under'—hypo, under, teinein, to stretch.]

Hypothec, hī-poth′ek, n. in Scotch law, a lien or security over goods in respect of a debt due by the owner of the goods.—adj. Hypoth′ecary, pertaining to hypothecation or mortgage.—v.t. Hypoth′ecāte, to place or assign anything as security under an arrangement: to mortgage.—ns. Hypothecā′tion; Hypoth′ecator. [Fr.,—L. hypotheca—Gr. hypothēkē, a pledge.]

Hypothesis, hī-poth′e-sis, n. a supposition: a proposition assumed for the sake of argument: a theory to be proved or disproved by reference to facts: a provisional explanation of anything.—v.i. Hypoth′esize, to form hypotheses.—adjs. Hypothet′ic, -al, belonging to a hypothesis: conditional.—adv. Hypothet′ically. [Gr., hypo, under, tithenai, to place.]

Hypotyposis, hī-po-ti-pō′sis, n. (rhet.) vivid description of a scene.

Hypozoic, hī-po-zō′ik, adj. (geol.) below the limit of life: belonging to the Hypozō′a.—adj. and n. Hypozō′an.