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

hum \hum\, n.
   1. a low monotonous noise, as of bees in flight, of a swiftly
      revolving top, of a wheel, or the like; a drone; a buzz.
      1913 webster

            the shard-borne beetle with his drowsy hums. --shak.
      1913 webster

   2. any inarticulate and buzzing sound; as:
      a the confused noise of a crowd or of machinery, etc.,
          heard at a distance; as, the hum of industry.
          1913 webster

                but 'midst the crowd, the hum, the shock of men.
                                                  --byron.
      b a buzz or murmur, as of approbation. --macaulay.
          1913 webster

   3. an imposition or hoax.
      1913 webster

   4. cf. hem, interj. an inarticulate nasal sound or
      murmur, like h'm, uttered by a speaker in pause from
      embarrassment, affectation, etc.
      1913 webster

            these shrugs, these hums and ha's.    --shak.
      1913 webster

   5. perh. so called because strongly intoxicating. a kind of
      strong drink formerly used. obs. --beau.  fl.
      1913 webster

   venous hum. see under venous.
      1913 webster
see also:
hem venous hum venous 

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

venous \ven"ous\, a. l. venosus, from vena a vein. see vein.
   1. anat. of or pertaining to a vein or veins; as, the
      venous circulation of the blood.
      1913 webster

   2. contained in the veins, or having the same qualities as if
      contained in the veins, that is, having a dark bluish
      color and containing an insufficient amount of oxygen so
      as no longer to be fit for oxygenating the tissues; --
      said of the blood, and opposed to arterial.
      1913 webster

   3. marked with veins; veined; as, a venous leaf.
      1913 webster

   venous leaf bot., a leaf having vessels branching, or
      variously divided, over its surface.

   venous hum med., a humming sound, or bruit, heard during
      auscultation of the veins of the neck in anaemia.

   venous pulse physiol., the pulse, or rhythmic
      contraction, sometimes seen in a vein, as in the neck,
      when there is an obstruction to the passage of blood from
      the auricles to the ventricles, or when there is an
      abnormal rigidity in the walls of the greater vessels.
      there is normally no pulse in a vein.
      1913 webster
see also:
vein venous leaf venous hum venous pulse 

Hum >> H Words
Hum, definition of term: Hum
hum_pag1.html

Crystalline Hum >> C Words
Crystalline Hum, definition of term: Crystalline Hum
crystalline+hum_pag1.html