Pedal curveor surface(Geom.), the curve or surface which is the locus of the feet of perpendiculars let fall from a fixed point upon the straight lines tangent to a given curve, or upon the planes tangent to a given surface.Pedal note(Mus.), the note which is held or sustained through an organ point. See Organ point, under Organ.Pedal organ(Mus.), an organ which has pedals or a range of keys moved by the feet; that portion of a full organ which is played with the feet.

(Pe"dal) n. [Cf. F. pédale, It. pedale. See Pedal, a.]

1. (Mech.) A lever or key acted on by the foot, as in the pianoforte to raise the dampers, or in the organ to open and close certain pipes; a treadle, as in a lathe or a bicycle.

2. (Geom.) A pedal curve or surface.

(Pe*da"li*an) a. Relating to the foot, or to a metrical foot; pedal. [R.] Maunder.

(Pe*dal"i*ty) n. The act of measuring by paces. [R.] Ash.

(Pe*da"ne*ous) a. [L. pedaneus of the size of a foot.] Going on foot; pedestrian. [R.]

(Ped"ant) n. [F. pédant, It. pedante, fr. Gr. to instruct, from pai^s boy. See Pedagogue.]

1. A schoolmaster; a pedagogue. [Obs.] Dryden.

A pedant that keeps a school i'th' church.

2. One who puts on an air of learning; one who makes a vain display of learning; a pretender to superior knowledge. Addison.

A scholar, yet surely no pedant, was he.

(Pe*dan"tic Pe*dan"tic*al) a. Of or pertaining to a pedant; characteristic of, or resembling, a pedant; ostentatious of learning; as, a pedantic writer; a pedantic description; a pedantical affectation. "Figures pedantical." Shak.

(Pe*dan"tic*al*ly), adv. In a pedantic manner.

(Pe*dan"tic*ly) adv. Pedantically. [R.]

(Ped"ant*ism) n. The office, disposition, or act of a pedant; pedantry. [Obs.]

(Ped"ant*ize) v. i. [Cf. F. pédantiser.] To play the pedant; to use pedantic expressions. [R.]

(Ped`an*toc"ra*cy) n. [Pedant + democracy.] The sway of pedants. [R.] J. S. Mill.

(Ped"a*gogue), v. t. [Cf. L. paedagogare to instruct.] To play the pedagogue toward. [Obs.] Prior.

(Ped"a*go`gy) n. [Gr. : cf. F. pédagogie.] Pedagogics; pedagogism. South.

(Pe"dal) a. [L. pedalis, fr. pes, pedis, foot. See Foot, and cf. Pew.]

1. Of or pertaining to the foot, or to feet, literally or figuratively; specifically (Zoöl.), pertaining to the foot of a mollusk; as, the pedal ganglion.

2. Of or pertaining to a pedal; having pedals.

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