canicular (adj.)youdaoicibaDictYouDict[canicular 词源字典]
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.[canicular etymology, canicular origin, 英语词源]