资料来源 : pyDict

坚果,核桃;难题,难事,难对付的人

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Nut \Nut\, n. [OE. nute, note, AS. hnutu; akin to D. noot, G.
   nuss, OHG. nuz, Icel. hnot, Sw. n["o]t, Dan. n["o]d.]
   1. (Bot.) The fruit of certain trees and shrubs (as of the
      almond, walnut, hickory, beech, filbert, etc.), consisting
      of a hard and indehiscent shell inclosing a kernel.

   2. A perforated block (usually a small piece of metal),
      provided with an internal or female screw thread, used on
      a bolt, or screw, for tightening or holding something, or
      for transmitting motion. See Illust. of lst {Bolt}.

   3. The tumbler of a gunlock. --Knight.

   4. (Naut.) A projection on each side of the shank of an
      anchor, to secure the stock in place.

   {Check nut}, {Jam nut}, {Lock nut}, a nut which is screwed up
      tightly against another nut on the same bolt or screw, in
      order to prevent accidental unscrewing of the first nut.
      

   {Nut buoy}. See under {Buoy}.

   {Nut coal}, screened coal of a size smaller than stove coal
      and larger than pea coal; -- called also {chestnut coal}.
      

   {Nut crab} (Zo["o]l.), any leucosoid crab of the genus
      {Ebalia} as, {Ebalia tuberosa} of Europe.

   {Nut grass} (Bot.), a plant of the Sedge family ({Cyperus
      rotundus}, var. Hydra), which has slender rootstocks
      bearing small, nutlike tubers, by which the plant
      multiplies exceedingly, especially in cotton fields.

   {Nut lock}, a device, as a metal plate bent up at the
      corners, to prevent a nut from becoming unscrewed, as by
      jarring.

Nut \Nut\, v. i. [imp. & p. p. {Nutted}; p. pr. & vb. n.
   {Nutting}.]
   To gather nuts.

Buoy \Buoy\, n. [D. boei buoy, fetter, fr. OF. boie, buie,
   chain, fetter, F. bou['e]e a buoy, from L. boia. ``Boiae
   genus vinculorum tam ferreae quam ligneae.'' --Festus. So
   called because chained to its place.] (Naut.)
   A float; esp. a floating object moored to the bottom, to mark
   a channel or to point out the position of something beneath
   the water, as an anchor, shoal, rock, etc.

   {Anchor buoy}, a buoy attached to, or marking the position
      of, an anchor.

   {Bell buoy}, a large buoy on which a bell is mounted, to be
      rung by the motion of the waves.

   {Breeches buoy}. See under {Breeches}.

   {Cable buoy}, an empty cask employed to buoy up the cable in
      rocky anchorage.

   {Can buoy}, a hollow buoy made of sheet or boiler iron,
      usually conical or pear-shaped.

   {Life buoy}, a float intended to support persons who have
      fallen into the water, until a boat can be dispatched to
      save them.

   {Nut} or {Nun buoy}, a buoy large in the middle, and tapering
      nearly to a point at each end.

   {To stream the buoy}, to let the anchor buoy fall by the
      ship's side into the water, before letting go the anchor.
      

   {Whistling buoy}, a buoy fitted with a whistle that is blown
      by the action of the waves.

资料来源 : WordNet®

nut
     v : gather nuts
     [also: {nutting}, {nutted}]

nut
     n 1: usually large hard-shelled seed
     2: Egyptian goddess of the sky
     3: a small (usually square or hexagonal) metal block with
        internal screw thread to be fitted onto a bolt
     4: half the width of an em [syn: {en}]
     5: a whimsically eccentric person [syn: {crackpot}, {crank}, {nut
        case}, {nutcase}, {fruitcake}, {screwball}]
     6: someone who is so ardently devoted to something that it
        resembles an addiction; "a golf addict"; "a car nut"; "a
        news junkie" [syn: {addict}, {freak}, {junkie}, {junky}]
     7: one of the two male reproductive glands that produce
        spermatozoa and secrete androgens; "she kicked him in the
        balls and got away" [syn: {testis}, {testicle}, {orchis},
        {ball}, {ballock}, {bollock}, {egg}]
     [also: {nutting}, {nutted}]