Source : Webster's Revised Unabridged Dictionary (1913)

Hypochondriac \Hy`po*chon"dri*ac\, n.
   A person affected with hypochondriasis.

         He had become an incurable hypochondriac. --Macaulay.

Hypochondriac \Hy`po*chon"dri*ac\, a. [Gr. ? affocated in the
   hypochondrium: cf. F. hypocondriaque, formerly spelt
   hypochondriaque.]
   1. Of or pertaining to hypochondria, or the hypochondriac
      regions.

   2. Affected, characterized, or produced, by hypochondriasis.

   {Hypochondriac region} (Anat.), a region on either side of
      the abdomen beneath the cartilages of the false ribs,
      beside the epigastric, and above the lumbar, region.

Source : WordNet®

hypochondriac
     adj : suffering from hypochondria [syn: {hypochondriacal}]

hypochondriac
     n : a patient with imaginary symptoms and ailments