1. The basic rhythmic unit in a piece of music Noun
2. Recurring at regular intervals Noun
3. An interval during which a recurring sequence of events occurs Noun
4. The arrangement of spoken words alternating stressed and unstressed elements Noun
5. Natural family planning in which ovulation is assumed to occur 14 days before the onset of a period (the fertile period would be assumed to extend from day 10 through day 18 of her cycle) Noun