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Common to, or affecting at the same time, a large number in a community; -- applied to a disease which, spreading widely, attacks many persons at the same time; as, an epidemic disease; an epidemic catarrh, fever, etc. See Endemic.

ue, etc.; having the same magnitude, the same value, the same degree, etc.; -- applied to number, degree, quantity, and intensity, and to any subject which admits of them; neither inferior nor superior, greater nor less, better nor worse; corresponding; alike; as, equal quantities of land, water, etc. ; houses of equal…

t to quantity; -- denoted by the symbol =; thus, a = x signifies that a contains the same number and kind of units of measure that x does. Confessional equality. See under Confessional.

, as given by observation, would yield different values of the quantities sought, and the number of equations that may be found is greater than the number of unknown quantities. -- Equation of a curve (Math.), an equation which expresses the relation between the coördinates of every point in the curve. -- Equation of…

Multiplied by the same number or quantity.

Equal as to number. [Obs.] Arbuthnot.

The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency. See Valence.

equivalents are 32.5 and 1. (b) The combining proportion by weight of a substance, or the number expressing this proportion, in any particular compound; as, the equivalents of hydrogen and oxygen in water are respectively 1 and 8, and in hydric dioxide 1 and 16.

e of an error and the frequency with which that error will be committed in making a large number of careful measurements of a quantity. -- Probable error. (Mensuration) See under Probable. -- Writ of error (Law), an original writ, which lies after judgment in an action at law, in a court of record, to correct some al…

To from an opinion of, as to amount,, number, etc., from imperfect data, comparison, or experience; to make an estimate of; to calculate roughly; to rate; as, to estimate the cost of a trip, the number of feet in a piece of land.

A piece of furniture having a number of uninclosed shelves or stages, one above another, for receiving articles of elegance or use. Fairholt.

Not odd; capable of division by two without a remainder; -- said of numbers; as, 4 and 10 are even numbers. Whether the number of the stars is even or odd. Jer. Taylor. On even ground, with equal advantage. -- On even keel (Naut.), in a level or horizontal position.

An order of fishes including a vast number of freshwater species such as the carp, loach, chub, etc.

All the parts which compose a whole collection or aggregate number, considered in their individuality, all taken separately one by one, out of an indefinite bumber. Every man at his best state is altogether vanity. Ps. xxxix. 5. Every door and window was adorned with wreaths of flowers. Macaulay.

To take or leave out (anything) from a number or a whole as not belonging to it; to exclude; to omit. Who never touched The excepted tree. Milton. Wherein (if we only except the unfitness of the judge) all other things concurred. Bp. Stillingfleet.

The degree or amount by which one thing or number exceeds another; remainder; as, the difference between two numbers is the excess of one over the other. Spherical excess (Geom.), the amount by which the sum of the three angles of a spherical triangle exceeds two right angles. The spherical excess is proportional to th…

new layer to the outside next to the bark. The leaves are commonly netted-veined, and the number of cotyledons is two, or, very rarely, several in a whorl. Cf. Endogen. Gray.

A number, letter, or any quantity written on the right hand of and above another quantity, and denoting how many times the latter is repeated as a factor to produce the power indicated;

Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension. The law is that the intension of our knowledge is in the inverse ratio of its extension. Sir W. Hamilton. The extension of [the term] plant is greater than that of geranium, because it includes more obj…

few notorious falsehoods. Swift. To extract the root (Math.), to ascertain the root of a number or quantity.