She'd had no morning sickness, after all, and a single missed period meant nothing by itself.

It was the single most creative period in modern Chinese history.

No more than 10 have ever graduated on a single period.

That was the longest single period Friday had spent on one of his walks.

The governor had a term of five years to work in office and can be re-elected for another single period.

They scored a goal in every single period so far.

His whole world had turned inside out in a single twenty-four-hour period.

However, trills may also be produced with only a single period.

But the best is to concentrate all my attention during a single period.

Others believe that there was only a single, extended period of settlement.