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Having six metrical feet, especially dactyls and spondees. Holland.

Having the dorsal fin spines symmetrical, and in the same line; -- said of certain fishes.

Having the tail nearly or quite symmetrical, the vertebral column terminating near its base; -- opposed to heterocercal.

Having the ganglia of the nervous system symmetrically arranged, as in certain invertebrates; -- opposed to heterogangliate.

the focus of a lens or mirror, by rays of light from the several points of the object symmetrically refracted or reflected to corresponding points in such focus; this may be received on a screen, a photographic plate, or the retina of the eye, and viewed directly by the eye, or with an eyeglass, as in the telescope an…

Having unequal sides; unsymmetrical; unequal-sided.

introduction of anything among others, as the insertion of a phrase, line, or verse in a metrical composition; specif. (Geol.), the intrusion of a bed or layer between other layers. Intercalations of fresh-water species in some localities. Mantell.

moral rectitude, or to established principles; not normal; unnatural; immethodical; unsymmetrical; erratic; no straight; not uniform; as, an irregular line; an irregular figure; an irregular verse; an irregular physician; an irregular proceeding; irregular motion; irregular conduct, etc. Cf. Regular. Mazes intricate,…

as dextro- and lævo-tartaric acids. In such compounds there is usually at least one unsymmetrical carbon atom. See Unsymmetrical.

A subclass of Gastropoda, in which the body is symmetrical, the right and left sides being equal.

changes of position exhibit its contents in an endless variety of beautiful colors and symmetrical forms. It has been much employed in arts of design. Shifting like the fragments of colored glass in the kaleidoscope. G. W. Cable.

A curve in the form of the figure 8, with both parts symmetrical, generated by the point in which a tangent to an equilateral hyperbola meets the perpendicular on it drawn from the center.

ear figure is called a root. -- Linear problem (Geom.), a problem which may be solved geometrically by the use of right lines alone. -- Linear transformation (Alg.), a change of variables where each variable is replaced by a function of the first degree in the new variable.

ern (Arch.), an ornament for filling panels, copied from the folds of a piece of stuff symmetrically disposed.

A joint or limb; a division; a member; a part formed by growth, and articulated to, or symmetrical with, other parts. Chaucer.

ntities together and dividing by their number, which is called an arithmetical mean. A geometrical mean is the square root of the product of the quantities.

nical solution (Math.), a solution of a problem by any art or contrivance not strictly geometrical, as by means of the ruler and compasses, or other instruments.

Composition in metrical form; versification. [R.] Tennyson.

A metrical composition consisting of a single strophe.

in the tropical Pacific, but many other species are found fossil. The shell is spiral, symmetrical, and chambered, or divided into several cavities by simple curved partitions, which are traversed and connected together by a continuous and nearly central tube or siphuncle. See Tetrabranchiata.