Full Definition of DOWEL. 1. : a pin fitting into a hole in an abutting piece to prevent motion or slipping; also: a round rod or stick used especially for cutting up into dowels. 2. : a piece of wood driven into a wall so that other pieces can be nailed to it. See dowel defined for English-language learners.efinition of DOWEL for Kids. : a pin or peg used for fastening together two pieces of wood.
Most girls start their periods between the ages of 12 years and 14 years, but some start earlier or later. When you first start having your period, it may last only a few days. Your first few periods may be very light. You may only see a few spots of reddish brown blood. Anywhere from 2 to 7 days is normal.
The last day before your next period would be Day 28 if you have the average 28-day menstrual cycle. Normal menstrual cycle length, in adolescent girls, is 21 to 45 days. Normal menstrual cycle length in adult women is from 21 to 35 days. During the first few years of menstruation, periods are often irregular. You may skip several months between your first period, or menarche, and the next time you menstruate. It is also probable that you may have two periods that are 28 days apart and then skip a period.