- pertaining to the rising of the Dog Star or to the star itself.
- of or relating to the star Sirius or its rising
late 14c., in reference to the “dog days,” from Latin canicularis “pertaining to the dog days,” from canicula “little dog,” also “the Dog Star,” diminutive of canis (see canine). Also see heliacal; Sirius. In literal use (“pertaining to a dog”) historically only as attempt at humor.