Source : Webster's Revised Unabridged Dictionary (1913)

Canicular \Ca*nic"u*lar\, a. [L. canicularis; cf. F.
   caniculaire.]
   Pertaining to, or measured, by the rising of the Dog Star.

   {Canicular days}, the dog days, See {Dog days}.

   {Canicular year}, the Egyptian year, computed from one
      heliacal rising of the Dog Star to another.

Source : WordNet®

canicular
     adj 1: of or relating to the dog days of summer; "the canicular
            heat of the Deep South"
     2: relating to or especially immediately preceding or following
        the heliacal rising of Canicula (the Dog Star); "canicular
        days"