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A unit equal to the product of one complete convolution (of a coiled conductor) into one ampère of current; thus, a conductor having five convolutions and carrying a current of half an ampère is said to have 2½ ampère turns. The magnetizing effect of a coil is proportional to the number of its ampère turns.…

nitrate of silver in water, deposits silver at the rate of 0.001118 grams per second. Called also the international ampère.

connected by a spindle-shaped bundle of rodlike fibers diverging from each aster, and called the spindle.

Pertaining to an Attic festival at the naming of a child; -- so called because the friends of the parents carried the child around the hearth and then named it.

(Amphioxus lanceolatus), two or three inches long, found in temperature seas; -- also called the lancelet. Its body is pointed at both ends. It is the lowest and most generalized of the vertebrates, having neither brain, skull, vertebræ, nor red blood. It forms the type of the group Acrania, Leptocardia, etc.…

A fabled serpent with a head at each end, moving either way. Milton.

An oval or circular building with rising tiers of seats about an open space called the arena.

Among the ancients, a two-handled vessel, tapering at the bottom, used for holding wine, oil, etc.

Produced by, or indicating, a cavity in the lungs, not filled, and giving a sound like that produced by blowing into an empty decanter; as, amphoric respiration or resonance.

arbons, C5H10, of the ethylene series. The colorless, volatile, mobile liquid commonly called amylene is a mixture of different members of the group.

sit of an albuminous substance, giving a blue color with iodine and sulphuric acid; -- called also waxy or lardaceous degeneration.

This word is properly an adjective, but is commonly called the indefinite article. It is used before nouns of the singular number only, and signifies one, or any, but somewhat less emphatically. In such expressions as "twice an hour," "once an age," a shilling an ounce (see 2d A, 2), it has a distributive force, and is…

t, like that of the younger Cyrus into Central Asia, described by Xenophon in his work called "The Anabasis." The anabasis of Napoleon. De Quincey.

The science of reflected light, now called catoptrics.

eæ), native to America. Transferred to England it became an obstruction to navigation. Called also waterweed and water thyme.

That part of optics which treats of the refraction of light; -- commonly called dioptrics. Encyc. Brit.

Anaërobic bacteria. They are called facultative anaërobia when able to live either in the presence or absence of free oxygen; obligate, or obligatory, anaërobia when they thrive only in its absence.

Microörganisms which do not require oxygen, but are killed by it. Sternberg.

es of the fourth degree which have certain peculiar relations to circles; -- sometimes called bicircular quartics. -- Anallagmatic surfaces, a certain class of surfaces of the fourth degree.

ical sense; in accordance with analogy; by way of similitude. A prince is analogically styled a pilot, being to the state as a pilot is to the vessel. Berkeley.