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Look up period or periodic in Wiktionary, the free dictionary. Period may refer to: Period (punctuation) Era, a length or span of time Menstruation, commonly...

Semi-deciduous or semi-evergreen is a botanical term which refers to plants that lose their foliage for a very short period, when old leaves fall off...

the semi-major axis is one of the most important orbital elements of an orbit, along with its orbital period. For Solar System objects, the semi-major...

differs from the sidereal period because the object's semi-major axis typically advances slowly. Also, the tropical period of Earth (a tropical year)...

A semi-detached house (often abbreviated to semi) is a single-family duplex dwelling that shares one common wall with its neighbour. The name distinguishes...

issued by the time of Hadrian (117–138 AD). In the early Imperial period, a semis could buy a cerae (wax writing tablet). Roman currency Wikimedia Commons...

In classical antiquity, the Hellenistic period covers the time in Mediterranean history after Classical Greece, between the death of Alexander the Great...

In world-systems theory, the semi-periphery countries (sometimes referred to as just the semi-periphery) are the industrializing, mostly capitalist countries...

Vedic Period was a Bronze Age culture whereas the Late Vedic Period was an Iron Age culture.[citation needed] The transition of Vedic society from semi-nomadic...

includes 26 uppercase letters, 10 numbers, dash and period. Their shapes and dimensions are specified by SEMI M12/M13 standard, which was approved by Global...

The Ubaid period (c. 5500–3700 BC) is a prehistoric period of Mesopotamia. The name derives from Tell al-'Ubaid where the earliest large excavation of...

A semi-presidential republic, or dual executive republic, is a republic in which a president exists alongside a prime minister and a cabinet, with the...

The Uruk period (c. 4000 to 3100 BC; also known as Protoliterate period) existed from the protohistoric Chalcolithic to Early Bronze Age period in the history...

various semi-automatic rifles designed between 1918 and 1935. Other nations experimented with self-loading rifles during the interwar period, including...

In Japanese history, the Jōmon period (縄文時代, Jōmon jidai) is the time between c. 14,000 and 300 BC, during which Japan was inhabited by a diverse hunter-gatherer...

A semi-synchronous orbit is an orbit with a period equal to half the average rotational period of the body being orbited, and in the same direction as...

The Avestan period (c. 1500 – c. 500 BCE) is the period in the history of the Iranians when the Avesta was produced. It saw important contributions to...

In the history of the 20th century, the interwar period (or interbellum) lasted from 11 November 1918 to 1 September 1939 (20 years, 9 months, 21 days)...

The Second Temple period or post-exilic period in Jewish history denotes the approximately 600 years (516 BCE – 70 CE) during which the Second Temple stood...

A flexitarian diet, also called a semi-vegetarian diet, is one that is centered on plant foods with limited or occasional inclusion of meat. For example...