| rhythm | (noun) 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) | Synonyms: calendar method, calendar method of birth control, rhythm method, rhythm method of birth control |
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| (noun) recurring at regular intervals | Synonyms: regular recurrence |
| (noun) (architecture) the repetitive use of a group of visual elements to establish a recognizable pattern | - |
| (noun) the arrangement of spoken words alternating stressed and unstressed elements | Synonyms: speech rhythm |
| (noun) the basic rhythmic unit in a piece of music | Synonyms: beat, musical rhythm |
| (noun) an interval during which a recurring sequence of events occurs | Synonyms: cycle, round |