Word Origin and History for corrugated Expand. adj. 1620s, wrinkled (of skin, etc.), past participle adjective from corrugate. Meaning bent into curves or folds (of iron, cardboard, etc., for elasticity and strength) is from 1853.
on average girls start puberty between the ages of 9 and 14 but some will start to develop breasts or pubic hair by age 8 and a small number will start to mature before age 7the technical term for this is precocious pubertygirls are five times more likely than boys to develop precocious pubertyn average girls start puberty between the ages of 9 and 14 but some will start to develop breasts or pubic hair by age 8 and a small number will start to mature before age 7
1 For girls, puberty can start as early as age 7Â½ years or as late as age 13. 2  Their breasts begin to develop and their hips get wider. 3  Girls start to grow underarm hair and pubic hair, and have a growth spurt.4  They start having menstrual periods about 2 to 3 years after their breasts start to develop. For girls, puberty can start as early as age 7Â½ years or as late as age 13. 2  Their breasts begin to develop and their hips get wider. 3  Girls start to grow underarm hair and pubic hair, and have a growth spurt.