(Mus.), the standard of pitch used by orchestras, as in concerts, etc.Diametral pitch(Gearing), the distance which bears the same relation to the pitch proper, or circular pitch, that the diameter of a circle bears to its circumference; it is sometimes described by the number expressing the quotient obtained by dividing the number of teeth in a wheel by the diameter of its pitch circle in inches; as, 4 pitch, 8 pitch, etc.Pitch chain, a chain, as one made of metallic plates, adapted for working with a sprocket wheel.Pitch line, or Pitch circle(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 concentric with the axis of the gear; the line, or circle, on which the pitch of teeth is measured.Pitch of a roof(Arch.), the inclination or slope of the sides expressed by the height in parts of the span; as, one half pitch; whole pitch; or by the height in parts of the half span, especially among engineers; or by degrees, as a pitch of 30°, of 45°, etc.; or by the rise and run, that is, the ratio of the height to the half span; as, a pitch of six rise to ten run. Equilateral pitch is where the two sloping sides with the span form an equilateral triangle.Pitch of a plane(Carp.), the slant of the cutting iron.Pitch pipe, a wind instrument used by choristers in regulating the pitch of a tune.Pitch point(Gearing), the point of contact of the pitch lines of two gears, or of a rack and pinion, which work together.

Pitch-black
(Pitch"-black`) a. Black as pitch or tar.

Pitchblende
(Pitch"blende`) n. [1st pitch + blende.] (Min.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

Pitch-dark
(Pitch"-dark`), a. Dark as a pitch; pitch-black.

Pitcher
(Pitch"er) n.

1. One who pitches anything, as hay, quoits, a ball, etc.; specifically (Baseball), the player who delivers the ball to the batsman.

2. A sort of crowbar for digging. [Obs.] Mortimer.

Pitcher
(Pitch"er) n. [OE. picher, OF. pichier, OHG. pehhar, pehhari; prob. of the same origin as E. beaker. Cf. Beaker.]

1. A wide-mouthed, deep vessel for holding liquids, with a spout or protruding lip and a handle; a water jug or jar with a large ear or handle.

2. (Bot.) A tubular or cuplike appendage or expansion of the leaves of certain plants.

American pitcher plants, the species of Sarracenia. See Sarracenia.Australian pitcher plant, the Cephalotus follicularis, a low saxifragaceous herb having two kinds of radical leaves, some oblanceolate and entire, others transformed into little ovoid pitchers, longitudinally triple-winged and ciliated, the mouth covered with a lid shaped like a cockleshell.California pitcher plant, the Darlingtonia California. See Darlingtonia.Pitcher plant, any plant with the whole or a part of the leaves transformed into pitchers or cuplike organs, especially the species of Nepenthes. See Nepenthes.

Pitcherful
(Pitch"er*ful) n.; pl. Pitcherfuls The quantity a pitcher will hold.

Pitch-faced
(Pitch"-faced`) a. (Stone Cutting) Having the arris defined by a line beyond which the rock is cut away, so as to give nearly true edges; — said of squared stones that are otherwise quarry-faced.

Pitchfork
(Pitch"fork`) n. A fork, or farming utensil, used in pitching hay, sheaves of grain, or the like.

Concert pitch

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