recurring at regular intervals
the basic rhythmic unit in a piece of music
the arrangement of spoken words alternating stressed and unstressed elements
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)
an interval during which a recurring sequence of events occurs
the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body
the courage to carry on
an area that is approximately central within some larger region
the choicest or most essential or most vital part of some idea or experience
