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ound with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually sphe…

from a soirée, or evening assembly; a matinée; hence, also, any general or somewhat miscellaneous gathering of guests, whether in the daytime or evening; as, the president's levee.

A horizontal line or plane; that is, a straight line or a plane which is tangent to a true level at a given point and hence parallel to the horizon at that point; -- this is the apparent level at the given point.

Turning or twisting the plane of polarization towards the left, as levulose, levotartaric acid, etc. [Written also lævogyrate.]

right-handed screw; counter-clockwise rotation; -- applied chiefly to the turning of the plane of polarization of light.

Turning or rotating the plane of polarization towards the left; levogyrate, as levulose, left handed quartz crystals, etc. [Written also lævorotatory.]

, etc., and hence called also fruit sugar. It is called levulose, because it rotates the plane of polarization to the left. [Written also lævulose.]C6H12O6.

The top of an ovary which opens transversely, as in the fruit of the purslane and the tree which yields Brazil nuts.

ls (Astron.), those parallels of latitude between which only an occultation of a star or planet by the moon, in a given case, can occur.

mines a dead center. See Dead center, under Dead. -- Line of dip (Geol.), a line in the plane of a stratum, or part of a stratum, perpendicular to its intersection with a horizontal plane; the line of greatest inclination of a stratum to the horizon. -- Line of fire (Mil.), the direction of fire. -- Line of force (P…

numbers as have relation to length only: such is a number which represents one side of a plane figure. If the plane figure is square, the linear 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…

lines or bars, fastened together by joins, and having certain of their points fixed in a plane. It is used to describe straight lines and curves in the plane.

e matrices for one line are properly arranged; the stereotype, or slug, is then cast and planed, and the matrices are returned to their proper places, the whole process being automatic.

Flowing freely like water; fluid; not solid. Yes, though he go upon the plane and liquid water which will receive no step. Tyndale.

fields through which cattle are driven, and where the cows are sometimes milked; also, a lane. [Scot.] Sir W. Scott.

inate law; the surface described by a point or line that moves according to a given law. Plane locus, a locus that is a straight line, or a circle. -- Solid locus, a locus that is one of the conic sections.

A lane. See Loanin. [Prov. Eng.]

The planet Venus, when appearing as the morning star; -- applied in Isaiah by a metaphor to a king of Babylon. How art thou fallen from heaven, O Lucifer, son of the morning ! how art thou cut down to the ground which didst weaken the nations ! Is. xiv. 12. Tertullian and Gregory the Great understood this passage of Is…

r Cycle. -- Lunar distance, the angular distance of the moon from the sun, a star, or a planet, employed for determining longitude by the lunar method. -- Lunar method, the method of finding a ship's longitude by comparing the local time of taking (by means of a sextant or circle) a given lunar distance, with the Gre…

ing or shaping wood, metal, etc., by means of a tool; especially, a machine, as a lathe, planer, drilling machine, etc., designed for a more or less general use in a machine shop, in distinction from a machine for producing a special article as in manufacturing. -- Machine twist, silken thread especially adapted for u…