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The ratio of the distance between the center and the focus of an ellipse or hyperbola to its semi-transverse axis.

all brought accurately and without undue effort to a focus upon the retina; -- opposed to hypermetropia, myopia, an astigmatism.

ing all the sides equal; as, an equilateral triangle; an equilateral polygon. Equilateral hyperbola (Geom.), one whose axes are equal. -- Equilateral shell (Zoöl.), one in which a transverse line drawn through the apex of the umbo bisects the valve, or divides it into two equal and symmetrical parts. -- Mutually equi…

esenting in an excessive manner; a going beyond the bounds of truth reason, or justice; a hyperbolical representation; hyperbole; overstatement. No need of an exaggeration of what they saw. I. Taylor.

Ornament; decoration; embellishment. [Obs.] Hyperbolical exornations . . . many much affect. Burton.

Hypermetropic.

Hypermetropia.

roove of a pulley. Gorge circle (Gearing), the outline of the smallest cross section of a hyperboloid of revolution. -- Gorge hook, two fishhooks, separated by a piece of lead. Knight.

bly true; as, they took his words for gospel. [Colloq.] If any one thinks this expression hyperbolical, I shall only ask him to read , instead of taking the traditional witticisms about Lee for gospel. Saintsbury.

, with labial appendages, and a single pair of gill openings. It is the type of the order Hyperotpeta. Called also hagfish, borer, slime eel, sucker, and sleepmarken.

American ironwood; also, a European species (O. vulgaris). -- Hop moth (Zoöl.), a moth (Hypena humuli), which in the larval state is very injurious to hop vines. -- Hop picker, one who picks hops. -- Hop pole, a pole used to support hop vines. -- Hop tree (Bot.), a small American tree (Ptelia trifoliata), having b…

plane and indefinitely near it. It is an ellipse when the curvature is synclastic, and an hyperbola when the curvature is anticlastic.

A large and handsome American moth (Hyperchiria Io), having a large, bright-colored spot on each hind wing, resembling the spots on the tail of a peacock. The larva is covered with prickly hairs, which sting like nettles.

ar the desired course. -- Leg bail, escape from custody by flight. [Slang] -- Legs of an hyperbola (or other curve) (Geom.), the branches of the curve which extend outward indefinitely. -- Legs of a triangle, the sides of a triangle; -- a name seldom used unless one of the sides is first distinguished by some appropr…

with both parts symmetrical, generated by the point in which a tangent to an equilateral hyperbola meets the perpendicular on it drawn from the center.

Able to see objects distinctly at a distance, but not close at hand; hypermetropic.

See Hypermetropia.

Enlargement or hypertrophy of the tongue.

The merrymaking of May Day. Tennyson. Italian may (Bot.), a shrubby species of Spiræa (S. hypericifolia) with many clusters of small white flowers along the slender branches. -- May apple (Bot.), the fruit of an American plant (Podophyllum peltatum). Also, the plant itself (popularly called mandrake), which has two lo…

Diminution; a species of hyperbole, representing a thing as being less than it really is.