[1] : The Collaborative International Dictionary of English v.0.48

crab \crab\ kra^b, n. as. crabba; akin to d. krab, g.
   krabbe, krebs, icel. krabbi, sw. krabba, dan. krabbe, and
   perh. to e. cramp. cf. crawfish.
   1. zool. one of the brachyuran crustacea. they are mostly
      marine, and usually have a broad, short body, covered with
      a strong shell or carapace. the abdomen is small and
      curled up beneath the body.
      1913 webster

   note: the name is applied to all the brachyura, and to
         certain anomura, as the hermit crabs. formerly, it was
         sometimes applied to crustacea in general. many species
         are edible, the blue crab of the atlantic coast being
         one of the most esteemed. the large european edible
         crab is cancer padurus. soft-shelled crabs are blue
         crabs that have recently cast their shells. see
         cancer; also, box crab, fiddler crab, hermit
         crab, spider crab, etc., under box, fiddler.
         etc.
         1913 webster

   2. the zodiacal constellation cancer.
      1913 webster

   3. see crab, a. bot. a crab apple; -- so named from its
      harsh taste.
      1913 webster

            when roasted crabs hiss in the bowl,
            then nightly sings the staring owl.   --shak.
      1913 webster

   4. a cudgel made of the wood of the crab tree; a crabstick.
      obs. --garrick.
      1913 webster

   5. mech.
      a a movable winch or windlass with powerful gearing,
          used with derricks, etc.
      b a form of windlass, or geared capstan, for hauling
          ships into dock, etc.
      c a machine used in ropewalks to stretch the yarn.
      d a claw for anchoring a portable machine.
          1913 webster

   calling crab. zool. see fiddler., n., 2.

   crab apple, a small, sour apple, of several kinds; also,
      the tree which bears it; as, the european crab apple
      pyrus malus var. sylvestris; the siberian crab apple
      pyrus baccata; and the american pyrus coronaria.
      

   crab grass. bot.
      a a grass digitaria sanguinalis syn. panicum
          sanguinalis; -- called also finger grass.
      b a grass of the genus eleusine eleusine indica;
          -- called also dog's-tail grass, wire grass, etc.
          

   crab louse zool., a species of louse phthirius pubis,
      sometimes infesting the human body.

   crab plover zool., an asiatic plover dromas ardeola.
      

   crab's eyes, or crab's stones, masses of calcareous
      matter found, at certain seasons of the year, on either
      side of the stomach of the european crawfishes, and
      formerly used in medicine for absorbent and antacid
      purposes; the gastroliths.

   crab spider zool., one of a group of spiders
      laterigradae; -- called because they can run
      backwards or sideways like a crab.

   crab tree, the tree that bears crab applies.

   crab wood, a light cabinet wood obtained in guiana, which
      takes a high polish. --mcelrath.

   to catch a crab naut., a phrase used of a rower:
      a when he fails to raise his oar clear of the water;
      b when he misses the water altogether in making a
          stroke.
          1913 webster
see also:
crawfish cancer padurus soft-shelled crabs cancer box crab fiddler crab 
hermit crab spider crab box fiddler crab 
calling crab crab apple pyrus malus pyrus baccata pyrus coronaria 
crab grass digitaria sanguinalis panicum sanguinalis finger grass eleusine 
eleusine indica dog's-tail grass wire grass crab louse phthirius pubis 
crab plover dromas ardeola crab's eyes crab's stones crab spider 
laterigradae crab tree crab wood to catch a crab 

[2] : The Collaborative International Dictionary of English v.0.48

apple \ap"ple\ a^p"p'l, n. oe. appel, eppel, as. aeppel,
   aepl; akin to fries.  d. appel, ohg, aphul, aphol, g.
   apfel, icel. epli, sw. aumple, dan. aeble, gael. ubhall,
   w. afal, arm. aval, lith. obulys, russ. iabloko; of
   unknown origin.
   1. the fleshy pome or fruit of a rosaceous tree pyrus
      malus cultivated in numberless varieties in the
      temperate zones.
      1913 webster

   note: the european crab apple is supposed to be the original
         kind, from which all others have sprung.
         1913 webster

   2. bot. any tree genus pyrus which has the stalk sunken
      into the base of the fruit; an apple tree.
      1913 webster

   3. any fruit or other vegetable production resembling, or
      supposed to resemble, the apple; as, apple of love, or
      love apple a tomato, balsam apple, egg apple, oak apple.
      1913 webster

   4. anything round like an apple; as, an apple of gold.
      1913 webster

   note: apple is used either adjectively or in combination; as,
         apple paper or apple-paper, apple-shaped, apple
         blossom, apple dumpling, apple pudding.
         1913 webster

   apple blight, an aphid which injures apple trees. see
      blight, n.

   apple borer zool., a coleopterous insect saperda
      candida or saperda bivittata, the larva of which bores
      into the trunk of the apple tree and pear tree.

   apple brandy, brandy made from apples.

   apple butter, a sauce made of apples stewed down in cider.
      --bartlett.

   apple corer, an instrument for removing the cores from
      apples.

   apple fly zool., any dipterous insect, the larva of which
      burrows in apples. apple flies belong to the genera
      drosophila and trypeta.

   apple midge zool. a small dipterous insect sciara
      mali, the larva of which bores in apples.

   apple of the eye, the pupil.

   apple of discord, a subject of contention and envy, so
      called from the mythological golden apple, inscribed "for
      the fairest," which was thrown into an assembly of the
      gods by eris, the goddess of discord. it was contended for
      by juno, minerva, and venus, and was adjudged to the
      latter.

   apple of love, or love apple, the tomato lycopersicum
      esculentum.

   apple of peru, a large coarse herb nicandra physaloides
      bearing pale blue flowers, and a bladderlike fruit
      inclosing a dry berry.

   apples of sodom, a fruit described by ancient writers as
      externally of fair appearance but dissolving into smoke
      and ashes when plucked; dead sea apples. the name is often
      given to the fruit of solanum sodomaeum, a prickly
      shrub with fruit not unlike a small yellow tomato.

   apple sauce, stewed apples. u. s.

   apple snail or apple shell zool., a fresh-water,
      operculated, spiral shell of the genus ampullaria.

   apple tart, a tart containing apples.

   apple tree, a tree which naturally bears apples. see
      apple, 2.

   apple wine, cider.

   apple worm zool., the larva of a small moth carpocapsa
      pomonella which burrows in the interior of apples. see
      codling moth.

   dead sea apple.
      a pl. apples of sodom. also fig. "to seek the dead sea
          apples of politics." --s. b. griffin.
      b a kind of gallnut coming from arabia. see gallnut.
          1913 webster
see also:
pyrus malus pyrus apple blight blight apple borer saperda candida 
saperda bivittata apple brandy apple butter apple corer apple fly 
drosophila trypeta apple midge sciara mali apple of the eye 
apple of discord apple of love love apple lycopersicum esculentum apple of peru 
nicandra physaloides apples of sodom solanum sodomaeum apple sauce apple snail 
apple shell ampullaria apple tart apple tree apple, 2. 
apple wine apple worm carpocapsa pomonella codling moth dead sea apple 
gallnut 

Pyrus >> P Words
Pyrus, definition of term: Pyrus
pyrus_pag1.html

Malus >> M Words
Malus, definition of term: Malus
malus_pag1.html