The series of bodily changes that occur in the female of most mammals from one period of estrus to another. The estrous cycle usually takes place during a specific period known as the breeding season, which ensures that the young are born at a time when the chance of survival is greatest.
ear-to-ear. It's about smiling. Ear-to-ear smile or grin is when you have a very broad and generous smile. Such a smile when each corner of your mouth is by each of your ears. Explain to me why you don't have an ear-to-ear grin right now.
Laughing and smiling. 1  amused. 2  be all smiles idiom. 3  be in convulsions idiom.  be rolling in the aisles 1  idiom. be wreathed in smiles idiom. 2  beam. 3  bust. 4  gale. gales of laughter  idiom. 1  giggle. 2  giggler. giggly. grin/smile from ear to  ear 1  idiom. 2  simper. 3  smile. 4  smiley. smiling. 5  smilingly.  smirk. stitch.