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.
Ringing in the ear (tinnitus). Tinnitus is the perception of a ringing, buzzing, roaring, whistling or hissing sound in your ear. Feeling of fullness in the ear. People with Meniere's disease often feel pressure in the affected ears (aural fullness) or on the side of their heads.