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iod of 15 years, employed in Roman and ecclesiastical chronology, not founded on any astronomical period, but having reference to certain judicial acts which took place at stated epochs under the Greek emperors. -- Cycle of the moon, or Metonic cycle, a period of 19 years, after the lapse of which the new and full moo…

ing divisions; graduating. Dividing engine, a machine for graduating circles (as for astronomical instruments) or bars (as for scales); also, for spacing off and cutting teeth in wheels. -- Dividing sinker. (Knitting Mach.). See under Sinker.

Greater Dog, and the brightest star in the heavens; -- called also Canicula, and, in astronomical charts, a Canis Majoris. See Dog days.

e, making an angle of 23º 28' with the equator; -- used for illustrating and solving astronomical problems.

One who is conversant with political economy; a student of economics.

of regulating the distribution and uses of parts, conceived as the result of wise and economical adaptation in the author, whether human or divine; as, the animal or vegetable economy; the economy of a poem; the Jewish economy. The position which they [the verb and adjective] hold in the general economy of language. E…

the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the "American Ephemeris and Nautical Almanac."

The small distortion of an astronomical instrument caused by the weight of its parts; the amount to be added or substracted from the observed readings of the instrument to correct them for this distortion. The flexure of a curve (Math.), the bending of a curve towards or from a straight line.

Economical in the use or appropriation of resources; not wasteful or lavish; wise in the expenditure or application of force, materials, time, etc.; characterized by frugality; sparing; economical; saving; as, a frugal housekeeper; frugal of time. I oft admire How Nature, wise and frugal, could commit Such disproportio…

A treatise on this science. Astronomical, or Mathematical, geography treats of the earth as a planet, of its shape, its size, its lines of latitude and longitude, its zones, and the phenomena due to to the earth's diurnal and annual motions. -- Physical geography treats of the conformation of the earth's surface, of t…

In many of its properties it resembles caoutchouc, and it is extensively used for many economical purposes. The Mimusops globosa of Guiana also yields this material.

Pertaining or appropriate to a housewife; domestic; economical; prudent. A good sort of woman, ladylike and housewifely. Sir W. Scott.

Like a huswife; capable; economical; prudent. -- adv.

or, and their wages, duties, and rights. The great ideas of industrial development and economic social amelioration. M. Arnold.

ult is effected; a tool; a utensil; an implement; as, the instruments of a mechanic; astronomical instruments. All the lofty instruments of war. Shak.

a filar micrometer, used chiefly for reading and subdividing the divisions of large astronomical and geodetical instruments. -- Micrometer screw, a screw with a graduated head used in some forms of micrometers. -- Position micrometer. See under Position. -- Scale, or Linear, micrometer, a minute and very delicately…

cially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer. The observed of all observers. Shak. Careful observers may foretell the hour, By sure prognostic, when to dread a shower. Swift.

See Phoronomics.

Physiognomic.

pared on a large scale in some of the Southern United States, and has many uses in the economic arts; -- called also pine- needle wool, and pine-wood wool.