3. Hence, a thing of small value; a trifle. He . . . did not care a pin for her. Spectator.
4. That which resembles a pin in its form or use; as: (a) A peg in musical instruments, for increasing or relaxing the tension of the strings. (b) A linchpin. (c) A rolling-pin. (d) A clothespin. (e) (Mach.) A short shaft, sometimes forming a bolt, a part of which serves as a journal. See Illust. of Knuckle joint, under Knuckle. (f) (Joinery) The tenon of a dovetail joint.
5. One of a row of pegs in the side of an ancient drinking cup to mark how much each man should drink.
6. The bull's eye, or center, of a target; hence, the center. [Obs.] "The very pin of his heart cleft." Shak.
7. Mood; humor. [Obs.] "In merry pin." Cowper.
8. (Med.)
Defn: Caligo. See Caligo. Shak.
9. An ornament, as a brooch or badge, fastened to the clothing by a pin; as, a Masonic pin.
10. The leg; as, to knock one off his pins. [Slang] Banking pin (Horol.), a pin against which a lever strikes, to limit its motion. — Pin drill (Mech.), a drill with a central pin or projection to enter a hole, for enlarging the hole, or for sinking a recess for the head of a bolt, etc.; a counterbore. — Pin grass. (Bot.) See Alfilaria. — Pin hole, a small hole made by a pin; hence, any very small aperture or perforation. — Pin lock, a lock having a cylindrical bolt; a lock in which pins, arranged by the key, are used instead of tumblers. — Pin money, an allowance of money, as that made by a husband to his wife, for private and personal expenditure. — Pin rail (Naut.), a rail, usually within the bulwarks, to hold belaying pins. Sometimes applied to the fife rail. Called also pin rack. — Pin wheel. (a) A contrate wheel in which the cogs are cylindrical pins. (b) (Fireworks) A small coil which revolves on a common pin and makes a wheel of yellow or colored fire.
PIN
Pin, v. t. [imp. & p. p. Pinned; p. pr. & vb. n. Pinning.] Etym: [See
Pin, n.]