|
Period (from Greek περίοδος) or ''periodic'' may refer to: * Era, a length or span of time * Full stop or period, a punctuation mark == Science == * Wave period, the time taken for one full oscillation * Orbital period, the time for one object to complete an orbit around another * Period (periodic table), a horizontal row of the periodic table * Menstruation, is sometimes referred to as a "period" as it is the periodic discharge of blood and mucosal tissue (the endometrium) from the uterus and vagina * Period (gene), a gene in ''Drosophila'' involved in regulating circadian rhythm * Period (geology), a subdivision of geologic time 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Period」の詳細全文を読む スポンサード リンク
|