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An instrument for measuring the rise of water in the Nile during its periodical flood.

A vehement desire; esp. (Physiol.), the periodical sexual impulse of animals; heat; rut.

The path described by a heavenly body in its periodical revolution around another body; as, the orbit of Jupiter, of the earth, of the moon.

s which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.

A printed sheet appearing periodically; a newspaper; a journal; as, a daily paper.

A salt of periodic acid.

A table or other means for calculating the periodical functions of women. Dunglison.

The science of the relations between climate and periodic biological phenomena, as the migrations and breeding of birds, the flowering and fruiting of plants, etc. -- Phe`no*log"ic*al (#), a. -- Phe`no*log"ic*al*ly, adv. -- Phe*nol"o*gist (#), n.

A printed publication, more especially a newspaper or other periodical. Addison.

Anticipating the usual time; -- applied to a periodical disease whose paroxysms return at an earlier hour at every repetition.

A periodical work published once a quarter, or four times in a year.

his alkaloid, as the acetate, chloride, sulphate, etc., employed as a febrifuge or antiperiodic. Called also quinia, quinina, etc. [Written also chinine.]

tudent. -- Reading room, a room appropriated to reading; a room provided with papers, periodicals, and the like, to which persons resort.

A certain periodical profit, whether in money, provisions, chattels, or labor, issuing out of lands and tenements in payment for the use; commonly, a certain pecuniary sum agreed upon between a tenant and his landlord, paid at fixed intervals by the lessee to the lessor, for the use of land or its appendages; as, rent…

A periodical containing critical essays upon matters of interest, as new productions in literature, art, etc.

An instrument which periodically or otherwise interrupts an electric current. Wheatstone.

Movement in musical time, with periodical recurrence of accent; the measured beat or pulse which marks the character and expression of the music; symmetry of movement and accent. Moore (Encyc. )

Of or pertaining to a period; constituting a complete sentence. Periodic comet (Astron.), a comet that moves about the sun in an elliptic orbit; a comet that has been seen at two of its approaches to the sun. -- Periodic function (Math.), a function whose values recur at fixed intervals as the variable uniformly incre…

To perform a periodical revolution; to move onward as with a revolution; as, the rolling year; ages roll away.

be reflected, or polarized, or deflected by a magnetic field. They are regarded as nonperiodic, transverse pulses in the ether. They are used in examining opaque objects, as for locating fractures or bullets in the human body.