Source : Webster's Revised Unabridged Dictionary (1913)

Hydrophobia \Hy`dro*pho"bi*a\, n. [L., fr. Gr. ?; "y`dwr water +
   ? fear: cf. F. hydrophobie.] (Med.)
   (a) An abnormal dread of water, said to be a symptom of
       canine madness; hence:
   (b) The disease caused by a bite form, or inoculation with
       the saliva of, a rabid creature, of which the chief
       symptoms are, a sense of dryness and construction in the
       throat, causing difficulty in deglutition, and a marked
       heightening of reflex excitability, producing convulsions
       whenever the patient attempts to swallow, or is disturbed
       in any way, as by the sight or sound of water; rabies;
       canine madness. [Written also {hydrophoby}.]

Source : WordNet®

hydrophobia
     n 1: a symptom of rabies in humans consisting of an aversion to
          swallowing liquids
     2: a morbid fear of water
     3: an acute viral disease of the nervous system of warm-blooded
        animals (usually transmitted by the bite of a rabid
        animal); rabies is fatal if the virus reaches the brain
        [syn: {rabies}, {lyssa}, {madness}]