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a surface. Hyperboloid of revolution, an hyperboloid described by an hyperbola revolving about one of its axes. The surface has two separate sheets when the axis of revolution is the transverse axis, but only one when the axis of revolution is the conjugate axis of the hyperbola.

Any animal of the genus Hyrax, of which about four species are known. They constitute the order Hyracoidea. The best known species are the daman (H. Syriacus) of Palestine, and the klipdas (H. capensis) of South Africa. Other species are H. arboreus and H. Sylvestris, the former from Southern, and the latter from Weste…

One of a school of physicians in Italy, about the middle of the 17th century, who tried to apply the laws of mechanics and mathematics to the human body, and hence were eager student of anatomy; -- opposed to the iatrochemists.

ance having the appearance of ice; as, camphor ice. Anchor ice, ice which sometimes forms about stones and other objects at the bottom of running or other water, and is thus attached or anchored to the ground. -- Bay ice, ice formed in bays, fiords, etc., often in extensive fields which drift out to sea. -- Ground ic…

Members of a sect which sprung up in Spain about the year 1575. Their principal doctrine was, that, by means of prayer, they had attained to so perfect a state as to have no need of ordinances, sacraments, good works, etc.; -- called also Alumbrados, Perfectibilists, etc.

The condition or quality of being imminent; a threatening, as of something about to happen. The imminence of any danger or distress. Fuller.

To inclose, as with pales or stakes; to surround. Impale him with your weapons round about. Shak. Impenetrable, impaled with circling fire. Milton.

A gold coin of Russia worth ten rubles, or about eight dollars. McElrath.

To bring about, arrange, or make, on a sudden, or without previous preparation. Charles attempted to improvise a peace. Motley.

A Japanese measure of length equal to about two and one twelfth yards. [Written also ink.]

; as, the inclination of the plane of the earth's equator to the plane of the ecliptic is about 23º 28'; the inclination of two rays of light.

Not turned or changed about. [R.] Sir T. Browne.

ifference to all that occurs. Indifference can not but be criminal, when it is conversant about objects which are so far from being of an indifferent nature, that they are highest importance. Addison.

Having the edges rolled inward and then arranged about the axis without overlapping; -- said of leaves in vernation.

still worse, they that did thus break out spread the infection further by their wandering about with the distemper upon them. De Foe.

Hence, in general, the bringing about of an effect, phusical or moral, by a gradual process; controlling power quietly exerted; agency, force, or tendency of any kind which the sun exerts on animal and vegetable life; the influence of education on the mind; the influence, according to astrologers,of the stars over affa…

rinciple that men scarcely ever shake off, as long as they carry anything of human nature about them. South.

To ask about; to seek to know by asking; to make examination or inquiry respecting. Having thus at length inquired the truth concerning law and dispense. Milton. And all obey and few inquire his will. Byron.

s, especially in matters which do not concern the inquirer. A wise man is not inquisitive about things impertinent. Broome.

the instant is at rest. The motion of the body is for the instant simply that of rotation about the instantaneous axis. -- In`stan*ta"ne*ous*ly, adv. -- In`stan*ta"ne*ous*ness, n.