needle

n.

  1. A small instrument of steel, sharply pointed at one end, with an eye to receive a thread, -- used in sewing.
  2. See Magnetic needle, under Magnetic.
  3. A slender rod or wire used in knitting; a knitting needle; also, a hooked instrument which carries the thread or twine, and by means of which knots or loops are formed in the process of netting, knitting, or crocheting.
  4. One of the needle-shaped secondary leaves of pine trees. See Pinus.
  5. Any slender, pointed object, like a needle, as a pointed crystal, a sharp pinnacle of rock, an obelisk, etc.

v. t.

  1. To form in the shape of a needle; as, to needle crystals.

v. i.

  1. To form needles; to crystallize in the form of needles.