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

crude \crude\ kruddd, a. compar. cruder -~er; superl.
   crudest. l. crudus raw; akin to cruor blood which flows
   from a wound. see raw, and cf. cruel.
   1. in its natural state; not cooked or prepared by fire or
      heat; undressed; not altered, refined, or prepared for use
      by any artificial process; raw; as, crude flesh. "common
      crude salt." --boyle.
      1913 webster

            molding to its will each successive deposit of the
            crude materials.                      --i. taylor.
      1913 webster

   2. unripe; not mature or perfect; immature.
      1913 webster

            i come to pluck your berries harsh and crude.
                                                  --milton.
      1913 webster

   3. not reduced to order or form; unfinished; not arranged or
      prepared; ill-considered; immature. "crude projects."
      --macaulay.
      1913 webster

            crude, undigested masses of suggestion, furnishing
            rather raw materials for composition. --de quincey.
      1913 webster

            the originals of nature in their crude
            conception.                           --milton.
      1913 webster

   4. undigested; unconcocted; not brought into a form to give
      nourishment. "crude and inconcoct." --bacon.
      1913 webster

   5. having, or displaying, superficial and undigested
      knowledge; without culture or profundity; as, a crude
      reasoner.
      1913 webster

   6. paint. harsh and offensive, as a color; tawdry or in bad
      taste, as a combination of colors, or any design or work
      of art.
      1913 webster
see also:
cruder crudest raw cruel 

[2] : WordNet (r) 2.0

crude
     adj 1: not carefully or expertly made; "managed to make a crude
            splint"; "a crude cabin of logs with bark still on
            them"; "rough carpentry" syn: rough
     2: conspicuously and tastelessly indecent; "coarse language";
        "a crude joke"; "crude behavior"; "an earthy sense of
        humor"; "a revoltingly gross expletive"; "a vulgar
        gesture"; "full of language so vulgar it should have been
        edited" syn: coarse, earthy, gross, vulgar
     3: not refined or processed; "unrefined ore"; "crude oil" syn:
         unrefined, unprocessed ant: refined
     4: belonging to an early stage of technical development;
        characterized by simplicity and often crudeness; "the
        crude weapons and rude agricultural implements of early
        man"; "primitive movies of the 1890s"; "primitive living
        conditions in the appalachian mountains" syn: primitive,
         rude
     5: devoid of any qualifications or disguise or adornment; "the
        blunt truth"; "the crude facts"; "facing the stark reality
        of the deadline" syn: blunt, crudea, starka
     6: not processed or subjected to analysis; "raw data"; "the raw
        cost of production"; "only the crude vital statistics"
        syn: raw
     n : a dark oil consisting mainly of hydrocarbons syn: petroleum,
          crude oil, rock oil, fossil oil
see also:
rough coarse earthy gross vulgar unrefined 
unprocessed refined primitive rude blunt 
crudea starka raw petroleum crude oil 
rock oil fossil oil 

[3] : Moby Thesaurus II by Grady Ward, 1.0

225 moby thesaurus words for "crude":
   doric, abhorrent, abominable, amateurish, arrested, avgas,
   backward, barbaric, barbarous, barnyard, base, beastly,
   below contempt, beneath contempt, blatant, blinding, blue, blunt,
   boorish, brazen, brazenfaced, brusque, cacophonous, caddish,
   cloddish, clodhopping, clumsy, coarse, colorful, contemptible,
   crass, crude oil, despicable, detestable, dirty, disgusting,
   doggerel, dysphemistic, earthy, embryonic, ethyl, ethyl gas,
   execrable, extravagant, fetid, filthy, flagrant, flaring, flashy,
   flaunting, forbidding, fossil oil, foul, fulsome, garish, gas,
   gasoline, gaudy, glaring, gorgeous, graceless, gross, harsh,
   hateful, heinous, high-octane gas, high-test, ignoble, ignorant,
   ill-bred, immature, improper, impure, in bad taste, in embryo,
   in ovo, in the rough, inadequate, inconcinnate, inconcinnous,
   inconsiderate, incorrect, indecent, indecorous, indelicate,
   ineffective, inelegant, inexpert, infelicitous, inferior,
   insensible, insensitive, kerosene, lead-free gas, loathsome, loud,
   loutish, louty, low, low-lead gas, lowbred, lurid, malodorous,
   mephitic, meretricious, miasmal, miasmic, motor oil, nasty, native,
   natural, nauseating, noisome, noxious, objectionable, obnoxious,
   obscene, obtrusive, odious, offensive, ore, original, outlandish,
   overbright, oversimple, paraffin, petrol, petroleum, poor,
   premium gas, prentice, primitive, rare, raunchy, raw, raw material,
   rebarbative, red, reductionistic, reductive, regular, repellent,
   repugnant, repulsive, revolting, ribald, rich ore, rich vein,
   risque, rock oil, rough, rough diamond, roughcast, roughhewn, rude,
   rudimental, rudimentary, run-of-mine, rustic, savage, screaming,
   sensational, shameless, shrieking, sickening, simplistic, smutty,
   spectacular, stinking, stunted, tactless, tasteless, tawdry,
   unanalyzed mass, unbaked, unblown, unboiled, uncivil, uncooked,
   uncourtly, uncouth, uncultivated, uncultured, uncut, undercooked,
   underdeveloped, underdone, undeveloped, undignified, undressed,
   unenlightened, uneuphonious, unfashioned, unfelicitous, unfeminine,
   unfinished, unformed, ungenteel, ungentle, ungentlemanly,
   ungraceful, ungraded, unhewn, unlabored, unladylike, unlicked,
   unlicked cub, unmatured, unpolished, unprocessed, unproficient,
   unrefined, unseemly, unskilled, unsolicitous, unsophisticated,
   unsorted, untaught, untrained, untreated, unworked, unwrought,
   vile, virgin soil, vulgar

Crude >> C Words
Crude, definition of term: Crude
crude_pag1.html

Crude Oil >> C Words
Crude Oil, definition of term: Crude Oil
crude+oil_pag1.html