2.Definition: 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)Category: General
3.Definition: recurring at regular intervalsCategory: General
"The rhythm of Frost's poetry"Category: General
"The piece has a fast rhythm", "The conductor set the beat"
Related Noun(s):beatCategory: General