period

Everyday

1. A period is a length of time. tree →
2. At school, a period is one lesson in the timetable. tree →
3. In American English, a period is the dot (.) at the end of a sentence; British English calls it a full stop. tree →
4. A period is the time in history, like the Victorian period. tree →
5. A period is the time each month when a woman or girl bleeds from her womb (menstruation). tree →
6. In science, a period is a row in the periodic table. tree →

In the lessons

In maths, a period is a length of time measured in seconds, minutes or hours, and in problems "over a period of three hours" tells you the time. In history, periods are ages like the Stone Age or Tudor period. In health lessons, girls learn that periods are a normal part of growing up. In sport, matches like ice hockey are divided into periods.

Examples

• Maths is in the first period. tree →
• Over a period of two weeks, the seed grew ten centimetres. tree →
• Put a period at the end of the sentence. tree →
• We are studying the Roman period. tree →
• Dinosaurs lived in a period called the Mesozoic. tree →
• Periods are a normal part of growing up for girls. tree →
• Ice hockey has three periods. tree →
• Then came a dreadful period, when news from the king ceased entirely. tree →

Note

Countable. "Period" for "full stop" is mainly American. Adjective: periodic, periodical. In maths, "per period" means for each length of time.

In Jewish tradition

In maths, a period is a length of time measured in seconds, minutes or hours, and in problems "over a period of three hours" tells you the time. In history, periods are ages like the Stone Age or Tudor period. In health lessons, girls learn that periods are a normal part of growing up. In sport, matches like ice hockey are divided into periods.

Examples

• Dr. Zunz, the Nestor of the Jewish Rabbis in Europe, maintains that we have to look for the genesis of the book "Yezirah" in the Geonic period, (700-1000), and that it was consequently composed in a post-talmudical time. (Sefer Yetzirah, Kalisch 1877) tree →
• f"There was first ot all a period when Nothing existed . . . (Mordell, The Origin of Letters and Numerals according to Sefer Yetzirah (1914)) tree →
• Many writers maintain that only at a later period the principle of position and the zero was discovered. (Mordell, The Origin of Letters and Numerals according to Sefer Yetzirah (1914)) tree →

Note

Countable. "Period" for "full stop" is mainly American. Adjective: periodic, periodical. In maths, "per period" means for each length of time.