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
Age of Onset. The age of onset of puberty depends on a variety of factors, including nutrition. Most girls enter puberty between age 8 and 13, while guys enter puberty from age 10 to 15.A 2010 study published in Pediatrics by Frank Biro found that girls begin puberty at a younger age than in previous decades.ge of Onset. The age of onset of puberty depends on a variety of factors, including nutrition. Most girls enter puberty between age 8 and 13, while guys enter puberty from age 10 to 15.