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.
See a picture of a woman's reproductive system. The menstrual cycle is measured from the first day of menstrual bleeding, Day 1, up to Day 1 of your next menstrual bleeding. Although 28 days is the average cycle length, it is normal to have a cycle that is shorter or longer.1  A teen's cycles may be long (up to 45 days), growing shorter over several years.enstrual period. On Day 1 of your cycle, the thickened lining (endometrium) of the uterus begins to shed. You know this as menstrual bleeding from the vagina. A normal menstrual period can last 4 to 6 days. Most of your menstrual blood loss happens during the first 3 days.