Hyoid Bone
or HYOID ARCH, in anatomy, the second arch developed from the cranium, giving support to the tongue and attachment to numerous muscles of the neck.
HYPATIA (hi-pā'shē-ä), an Alexandrian teacher and heroine; born in Alexandria between 370-380. She was the daughter of Theon, an eminent mathematician of Alexandria, whom she succeeded in the government of that school. Orestes, the governor of Alexandria, had a high respect for Hypatia, and frequently consulted her on matters of imquently portance. Between the governor and the patriarch Cyril there was bitter enmity, which broke out into open war, and the monks siding with their chief, 4 assembled in a riotous manner against fers from presbyopia in being congenassembled in a riotous manner against having torn her in pieces, burnt her the city. They then seized Hypatia, and having torn her in pieces, burnt her mangled limbs to ashes, 415 A. D. a plethora or fullness of blood. The whole mass of the blood is increased to a vari- able extent. The face is full and turgid, with a purplish tinge. There is a tenmass of the blood is increased to a variable extent. The face is full and turgid, with a purplish tinge. There is a tendency to lassitude and sleep. Called also polyæmia.
HYPERÆSTHESIA (hi-per-es-thezē-ä), an excessive excitability of the parts of the nervous apparatus which have to do with sensation, special or peralgesia." In this condition, as in ticis, however, more correctly called "hyperalgesia." In this condition, as in ticdouloureux, the slightest stimulus may cause a paroxysm of pain, even a current of air or a noise bringing on an attack; while in hyperæsthesia of the special senses bright flashes of light may be seen, sounds may be heard, and even smells and tastes experienced in the absence of any objective cause. HYPERBOLA (hi-per'bō-lä), in mathematics, one of the three conic sections. It is a plane curve of such a form that if from any point in it two straight lines be drawn to two given fixed points, that if from any point in it two straight the excess of the straight line drawn to one of the points above the other will always be equal. The two points are called the foci. Other terms used of the hyperthe foci. Other terms used of the hypertum, directrix, and a term peculiar to it, asymptotes.
HYPERICACEE, HYPERI- CINE (hi-per-e-kas'-ē-i), or a natural order of about 300 known species, trees, shrubs, and herbaceous plants, widely distributed over the world, and in very different climates, but particularly in North America. The different climates, but particularly numerous in North America. The species of Vismia yield a substance reicaceæ belong to the genus Hypericum, or St. John's Wort. numerous