Hypæthral, hip-ē′thral, adj. roofless, open to the sky.—n. Hypæ′thron, an open court. [Gr. hypo, beneath, aithēr, air.]

Hypalgesia, hip-al-jē′si-a, n. diminished susceptibility to painful impressions—also Hyperal′gia.—adj. Hyperalgē′sic. [Gr. hypo, under, algos, pain.]

Hypallage, hi-pal′a-jē, n. (rhet.) a figure in which the relations of things in a sentence are mutually interchanged, but without obscuring the sense. [Fr.,—L.,—Gr. hypallassein, to interchange—hypo, under, alassein, to change.]

Hyperacute, hī-per-a-kūt′, adj. excessively acute.—n. Hyperacute′ness.

Hyperæsthesia, hī-per-es-thē′si-a, n. (path.) excessive sensibility.—adj. Hyperæsthet′ic.

Hyperbaton, hī-per′ba-ton, n. (rhet.) a figure by which words are transposed from their natural order.—adj. Hyperbat′ic.—adv. Hyperbat′ically. [Gr.,—hyperbaineinhyper, beyond, bainein, to go.]

Hyperbola, hī-per′bo-la, n. (geom.) one of the conic sections or curves formed when the intersecting plane makes a greater angle with the base than the side of the cone makes.—adjs. Hyperbol′ic, -al.—adv. Hyperbol′ically.—adjs. Hyperbol′iform; Hyper′boloid. [L.,—Gr. hyperbolē, from hyperballeinhyper, beyond, ballein, to throw.]

Hyperbole, hī-per′bo-le, n. a rhetorical figure which produces a vivid impression by representing things as much greater or less than they really are—not expecting to be taken literally: an obvious exaggeration.—adjs. Hyperbol′ic, -al.—adv. Hyperbol′ically.—v.t. Hyper′bolise, to represent hyperbolically.—v.i. to speak hyperbolically or with exaggeration.—n. Hyper′bolism. [A doublet of the above.]

Hyperborean, hī-per-bō′rē-an, adj. belonging to the extreme north.—n. an inhabitant of the extreme north. [Gr. hyperboreoshyper, beyond, Boreas, the north wind.]

Hypercatalectic, hī-per-kat-a-lek′tik, adj. (pros.) having an additional syllable or half-foot after the last complete dipody.—n. Hypercatalex′is.