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A salt of meconic acid.

A salt of mesaconic acid.

A conical rifle bullet, with a cavity in its base plugged with a piece of iron, which, by the explosion of the charge, is driven farther in, expanding the sides to fit closely the grooves of the barrel.

A salt of muconic acid.

he nadir of the human mind in Europe. Hallam. Nadir of the sun (Astron.), the axis of the conical shadow projected by the earth. Crabb.

A genus of small oceanic fishes, remarkable for the large conical tubercles which cover the under surface.

old lace or silver lace is worked; especially, one in which the edges are ornamented with conical figures placed at equal distances, with spots between them.

An extinct genus of Paleozoic Cephalopoda, having a long, straight, conical shell. The interior is divided into numerous chambers by transverse septa.

A pimple; a small, usually conical, elevation of the cuticle, produced by congestion, accumulated secretion, or hypertrophy of tissue; a papule. Quain.

A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus.

Specifically (Conic Sections), in the ellipse and hyperbola, a third proportional to any diameter and its conjugate, or in the parabola, to any abscissa and the corresponding ordinate.

A case containing powder to be exploded, esp. a conical or cylindrical case of metal filled with powder and attached to a plank, to be exploded against and break down gates, barricades, drawbridges, etc. It has been superseded.

A close-fitting cap represented in Greek art as worn by Orientals, assumed to have been conical in shape. It has been adopted in modern art as the so-called liberty cap, or cap of liberty.

A conical loaf of sugar.

a vessel for a pilot. -- Pilot jacket, a pea jacket. -- Pilot nut (Bridge Building), a conical nut applied temporarily to the threaded end of a pin, to protect the thread and guide the pin when it is driven into a hole. Waddell. -- Pilot snake (Zoöl.) (a) A large North American snake (Coluber obsoleus). It is lustr…

through the two points of contact of the two tangents drawn from a given point to a given conic section. The given point is called the pole of the line. If the given point lies within the curve so that the two tangents become imaginary, there is still a real polar line which does not meet the curve, but which possesses…

A property of the conic sections by virtue of which a given point determines a corresponding right line and a given right line determines a corresponding point. See Polar, n.

many; as, polygon, a figure of many angles; polyatomic, having many atoms; polychord, polyconic.

Any method of representing the surface of the earth upon a plane. Conical projection, a mode of representing the sphere, the spherical surface being projected upon the surface of a cone tangent to the sphere, the point of sight being at the center of the sphere. -- Cylindric projection, a mode of representing the sphe…

sed in steam engines, pumps, safety valves, etc. Its edge is often beveled, and fits in a conical recess in the seat when the valve is closed. See the valves shown in Illusts. of Plunger pump, and Safety valve, under Plunger, and Safety.