Period (periodic table), horizontal row of the periodic table "Period-" or "per-iod-", chemical prefix where "per" refers to oxidation state and "iod" refers to iodine

Menstruation — aka having your period — is when blood and tissue from your uterus comes out of your vagina. It usually happens once every month.

period, epoch, era, age mean a division of time. period may designate an extent of time of any length. epoch applies to a period begun or set off by some significant or striking quality, change, or series of …

PERIOD meaning: 1. a length of time: 2. a fixed time during the life of a person or in history: 3. in school, a…. Learn more.

Feb 29, 2024 · Menstruation (or period) happens monthly. As the uterus sheds its lining, vaginal bleeding follows. Menstrual blood is made of blood and tissue.

Define period. period synonyms, period pronunciation, period translation, English dictionary definition of period. The period is a punctuation mark primarily used to indicate the end of a sentence.

a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of …

Definition of period noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Your menstrual cycle begins on the first day of your period. Your cycle prepares your body for a possible pregnancy. The average cycle lasts between 24 and 38 days.

Oct 22, 2025 · Symptoms before your period range from fatigue and bloating to breast pain and cramping. Here, find signs that may mean your period is coming.