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d generated by the rotation of a parabola about its axis; any surface of the second order whose sections by planes parallel to a given line are parabolas.

ed for gymnastic exercises. -- Parallel circles of a sphere, those circles of the sphere whose planes are parallel to each other. -- Parallel columns, or Parallels (Printing), two or more passages of reading matter printed side by side, for the purpose of emphasizing the similarity or discrepancy between them. -- Pa…

A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles. Parallelogram of velocities, forces, accelerations, momenta, etc. (Mech.), a parallelog…

e six parallelograms, the opposite pairs being parallel, and equal to each other; a prism whose base is a parallelogram.

lant obtaining nourishment immediately from other plants to which it attaches itself, and whose juices it absorbs; -- sometimes, but erroneously, called epiphyte.

some of the variables are for the time constant. -- Partial fractions (Alg.), fractions whose sum equals a given fraction. -- Partial tones (Music), the simple tones which in combination form an ordinary tone; the overtones, or harmonics, which, blending with a fundamental tone, cause its special quality of sound, o…

cel; to exceed. And strive to pass . . . Their native music by her skillful art. Spenser. Whose tender power Passes the strength of storms in their most desolate hour. Byron.

ood made of paste, or having a crust made of paste, as pies, tarts, etc. Pastry cook, one whose occupation is to make pastry; as, the pastry cook of a hotel.

ne skilled in pathology; an investigator in pathology; as, the pathologist of a hospital, whose duty it is to determine the causes of the diseases.

Characteristic of a patriarch; venerable. About whose patriarchal knee Late the little children clung. Tennyson.

The guard or men who go the rounds for observation; a detachment whose duty it is to patrol.

A man of distinction under whose protection another person placed himself.

hom money is to be, or has been, paid; the person named in a bill or note, to whom, or to whose order, the amount is promised or directed to be paid. See Bill of exchange, under Bill.

quites; specifically, an officer or agent of a government, a corporation, or an employer, whose duty it is to pay salaries, wages, etc., and keep account of the same.

Any fish whose scales yield a pearl-like pigment used in manufacturing artificial pearls, as the bleak, and whitebait.

A fish whose bone Sir T. Browne.

A teacher of children; one whose occupation is to teach the young; a schoolmaster.

A crustacean, some of whose feet serve as oars.

tave. -- Perfect number (Arith.), a number equal to the sum of all its divisors; as, 28, whose aliquot parts, or divisors, are 14, 7, 4, 2,

One whose trade is to make or sell perfumes.