PERCH n.
the fresh-water drum. -- Red perch, the rosefish. -- Red-bellied perch, the long-eared pondfish. -- Perch pest, a small crustacean, parasitic in the mouth of the perch. -- Silver perch, the yellowtail. -- Stone, or Striped, perch, the pope. -- White perch, the Roccus, or Morone, Americanus, a small silvery serra…
PETROSAL a.
Of, pertaining to, or in the region of, the petrous, or petrosal, bone, or the corresponding part of the temporal bone. Petrosal bone (Anat.), a bone corresponding to the petrous portion of the temporal bone of man; or one forming more or less of the periotic capsule.
PILASTER n.
ight-angled in plan, constructionally a pier (See Pier, 1 (b)), but architecturally corresponding to a column, having capital, shaft, and base to agree with those of the columns of the same order. In most cases the projection from the wall is one third of its width, or less.
PITCH n.
e (Gearing), an ideal line, in a toothed gear or rack, bearing such a relation to a corresponding line in another gear, with which the former works, that the two lines will have a common velocity as in rolling contact; it usually cuts the teeth at about the middle of their height, and, in a circular gear, is a circle c…
PLOW; PLOUGH n.
Same as Charles's Wain. Ice plow, a plow used for cutting ice on rivers, ponds, etc., into cakes suitable for storing. [U. S.] -- Mackerel plow. See under Mackerel. -- Plow alms, a penny formerly paid by every plowland to the church. Cowell. -- Plow beam, that part of the frame of a plow to which the draught is appli…