labial \la"bial\, n.
   1. phonetics a letter or character representing an
      articulation or sound formed or uttered chiefly with the
      lips, as b, p, w.
      1913 webster

   2. mus. an organ pipe that is furnished with lips; a flue
      pipe.
      1913 webster

   3. zool. one of the scales which border the mouth of a fish
      or reptile.
      1913 webster
see also:
b p w 

w \w\ du^b"'l =u,
   the twenty-third letter of the english alphabet, is usually a
   consonant, but sometimes it is a vowel, forming the second
   element of certain diphthongs, as in few, how. it takes its
   written form and its name from the repetition of a v, this
   being the original form of the roman capital letter which we
   call u. etymologically it is most related to v and u. see v,
   and u. some of the uneducated classes in england, especially
   in london, confuse w and v, substituting the one for the
   other, as weal for veal, and veal for weal; wine for vine,
   and vine for wine, etc. see guide to pronunciation,
   sectsect 266-268.
   1913 webster

w
     n 1: a heavy gray-white metallic element; the pure form is used
          mainly in electrical applications; it is found in
          several ores including wolframite and scheelite syn: tungsten,
           wolfram, atomic number 74
     2: the cardinal compass point that is a 270 degrees syn: west,
         due west
     3: a unit of power equal to 1 joule per second; the power
        dissipated by a current of 1 ampere flowing across a
        resistance of 1 ohm syn: watt
     4: the 23rd letter of the roman alphabet syn: double-u
see also:
tungsten wolfram atomic number 74 west due west watt 
double-u