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The art of comparing, photometrically, the brightness of two spectra, wave length by wave length; the use of the spectrophotometer. --Spec`tro*pho`to*met"ric (#), a.

Rounded like a sphere; sphere-shaped; hence, symmetrical; complete; perfect.

sion and declination, the equator, ecliptic, etc., are conceived to be drawn; an ideal geometrical sphere, with the astronomical and geographical circles in their proper positions on it.

Any one of the several symmetrical segments arranged around the central axis and composing the body of a radiate anmal.

e front of a woman's dress over the bosom, usually worked or embroidered. [Obs.] Shak. Geometrical square. See Quadrat, n., 2. -- Hollow square (Mil.), a formation of troops in the shape of a square, each side consisting of four or five ranks, and the colors, officers, horses, etc., occupying the middle. -- Least squ…

A metrical portion; a stanza; a staff. Let us chant a passing stave In honor of that hero brave. Wordsworth.

ich the correspondence of index and stigma (see Stigma, 7) is made use of to establish geometrical proportions.

The art of drawing up an army, or any given number of men, in any geometrical figure, or of estimating or expressing the number of men in such a figure.

a road or line through it. Survey of dogs. See Court of regard, under Regard. -- Trigonometrical survey, a survey of a portion of country by measuring a single base, and connecting it with various points in the tract surveyed by a series of triangles, the angles of which are carefully measured, the relative positions…

Commensurable; symmetrical. [Obs.] Dr. H. More.

Symmetrical.

ibution of parts, such that an animal may be divided into parts which are structurally symmetrical.

e being, for example, the axis of abscissas, or a radius of a circle produced. See Trigonometrical function, under Function. Artificial, or Logarithmic, tangent, the logarithm of the natural tangent of an arc. -- Natural tangent, a decimal expressing the length of the tangent of an arc, the radius being reckoned unity…

An instrument used, especially in trigonometrical surveying, for the accurate measurement of horizontal angles, and also usually of vertical angles. It is variously constructed.

To change, as an algebraic expression or geometrical figure, into another from without altering its value.

triangles into which the face of a country, or any portion of it, is divided in a trigonometrical survey; the operation of measuring the elements necessary to determine the triangles into which the country to be surveyed is supposed to be divided, and thus to fix the positions and distances of the several points conne…

ts other required parts, and also of the general relations which exist between the trigonometrical functions of arcs or angles.

Three metrical feet taken together, or included in one measure.

A rhythmical, melodious, symmetrical series of tones for one voice or instrument, or for any number of voices or instruments in unison, or two or more such series forming parts in harmony; a melody; an air; as, a merry tune; a mournful tune; a slow tune; a psalm tune. See Air.

Symmetrical.