Canicular \Ca*nic"u*lar\, a. [L. canicularis; cf. F. caniculaire.]

Pertaining to, or measured, by the rising of the Dog Star. [1913 Webster]

Canicular days, the dog days, See Dog days.

Canicular year, the Egyptian year, computed from one heliacal rising of the Dog Star to another. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

63 Moby Thesaurus words for "canicular": aestival, arctic, ardent, autumn, autumnal, baking, blistering, boiling, boreal, broiling, brumal, burning, burning hot, ebullient, equinoctial, feverish, flushed, grilling, heated, hibernal, hiemal, hot, hot as fire, hot as hell, like a furnace, like an oven, midsummer, midwinter, out of season, overheated, overwarm, parching, piping hot, red-hot, roasting, scalding, scorching, searing, seasonal, seething, simmering, sizzling hot, smoking hot, solstitial, spring, springlike, sudorific, summer, summerlike, summerly, summery, sweating, sweaty, sweltering, sweltry, toasting, torrid, vernal, white-hot, winter, winterlike, wintery, wintry

Source: Moby Thesaurus II by Grady Ward, 1.0
 

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"

Source: WordNet (r) 2.0
 

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: Webster's Revised Unabridged Dictionary (1913)