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s are placed in the form of a triangle at spot. [Eng.] Altitude of a pyramid (Geom.), the perpendicular distance from the vertex to the plane of the base. -- Axis of a pyramid (Geom.), a straight line drawn from the vertex to the center of the base. -- Earth pyramid. (Geol.) See Earth pillars, under Earth. -- Right…

To inclination of anything from a perpendicular direction; as, the rake of a roof, a staircase, etc.; especially (Naut.,

Bending or curving gradually back from the perpendicular.

angle which anything, as a ray of light, on leaving a reflecting surface, makes with the perpendicular to the surface. -- Angle of total reflection. (Opt.) Same as Critical angle, under Critical.

previously moved. Refraction out of the rarer medium into the denser, is made towards the perpendicular. Sir I. Newton.

ght angles, so as to form a right angle or right angles, as when one line crosses another perpendicularly. -- Right and left, in both or all directions. [Colloq.] -- Right and left coupling (Pipe fitting), a coupling the opposite ends of which are tapped for a right-handed screw and a left-handed screw, respectivelly.…

ch, associated with certain diseases. The individual organisms undergo division along two perpendicular partitions, so that multiplication takes place in two directions, giving groups of four cubical cells. Also used adjectively; as, a sarcina micrococcus; a sarcina group. Sarcina form (Biol.), the tetrad form seen in…

To cut down perpendicularly, or nearly so; as, to scarp the face of a ditch or a rock. From scarped cliff and quarried stone. Tennyson. Sweep ruins from the scarped mountain. Emerson.

stron.), a great circle passes through the poles of another great circle and is therefore perpendicular to its plane. -- Secondary circuit, Secondary coil (Elec.), a circuit or coil in which a current is produced by the induction of a current in a neighboring circuit or coil called the primary circuit or coil. -- Sec…

A well-like excavation in the earth, perpendicular or nearly so, made for reaching and raising ore, for raising water, etc.

f an elastic body, consisting of an extension in one direction, an equal compression in a perpendicular direction, with an unchanged magnitude in the third direction. Shear blade, one of the blades of shears or a shearing machine. -- Shear hulk. See under Hulk. -- Shear steel, a steel suitable for shears, scythes, an…

The length of a perpendicular drawn from one extremity of an arc of a circle to the diameter drawn through the other extremity.

Inclined from a direct line, whether horizontal or perpendicular; sloping; oblique. "The slant lightning." Milton.

The short perpendicular line added to the body of a note; the tail of a crotchet, quaver, semiquaver, etc.

nomon, of a dial is erected; being the common section of the face of the dial and a plane perpendicular to it passing through the style. [Written also substile.] Hutton.

The part of a note which runs perpendicularly upward or downward from the head; the stem. Moore (Encyc. of Music).

ectangular tablet, slightly projecting, and divided nearly to the top by two parallel and perpendicular gutters, or channels, called glyphs, into three parts, or spaces, called femora. A half channel, or glyph, is also cut upon each of the perpendicular edges of the tablet. See Illust. of Entablature.…

To pull (a yard) into a perpendicular position for lowering it.

stead of the points, flat terminations, one of which is parallel to the handle, the other perpendicular to it. [Prov. Eng.]

A perpendicular shaft sunk to cut the lode at any required depth. Weale.