. . "It depends on the context. In medical terms, a period is a colloquial term for women's menses. In historical terms, a period is a time, usually lasting several years or even decades, notable for advances in technology, fashion, or literature. In writing, a period is a dot signifying the end of a declaratory sentence."@en . "What is a period"@en . . "It depends on the context. In medical terms, a period is a colloquial term for women's menses. In historical terms, a period is a time, usually lasting several years or even decades, notable for advances in technology, fashion, or literature. In writing, a period is a dot signifying the end of a declaratory sentence."@en . . .