lasting+period
31Ubaid period — The tell (mound) of Ubaid ( ar. عبيد) near Ur in southern Iraq has given its name to the prehistoric Pottery Neolithic to Chalcolithic culture, which represents the earliest settlement on the alluvial plain of southern Mesopotamia. The Ubaid… …
32Migration Period Pessimum — The Migration Period Pessimum (also referred to as Dark Ages Cold Period) was a period of unusually cold climate in the North Atlantic region, lasting from about 450 to about 900 AD. [cite journal |last=Desprat |first=Stéphanie |authorlink=… …
33Early Dynastic Period of Egypt — The Archaic or Early Dynastic Period of Egypt immediately follows the unification of Lower and Upper Egypt c. 3150 BC. It is generally taken to include the First and Second Dynasties, lasting from the Protodynastic Period of Egypt until 2686 BC,… …
34Pre-Islamic period of Afghanistan — Archaeological exploration of the Pre Islamic period of Afghanistan began in Afghanistan in earnest after World War II and proceeded until the Soviet invasion of Afghanistan disrupted it in December of 1979. Louis Dupree, the University of… …
35Hellenistic period — This article focuses on the historical aspects of the Hellenistic age; for the cultural aspects see Hellenistic civilisation. The Hellenistic period describes the era which followed the conquests of Alexander the Great. During this time, Greek… …
36Gestation period — The period of development of the young from the time of conception until birth. For humans the full gestation period is normally 9 months. The word gestation comes from the Latin gestare meaning to carry or to bear. * * * gestation period n the… …
37embryonic period — the earliest period or phase of lung development in utero, lasting from the third week after conception to the sixth week; it is sometimes not named as a defined period of lung development, which is instead considered to begin with the following… …
38alveolar period — the period or phase in lung development beginning in utero after the terminal saccular period (about 32 to 36 weeks) and lasting until about eight years of age. The terminal alveolar saccules subdivide several more times and mature alveoli form.… …
39canalicular period — the period or phase of prenatal lung development lasting in different parts of the lungs from the sixteenth or seventeenth week to the twenty sixth week or later, and followed by the terminal saccular period. Basic structures of the gas… …
40pseudoglandular period — the period or phase of prenatal lung development lasting from about the sixth to the sixteenth week, and followed by the canalicular period. Repeated branching of bronchi and bronchioles takes place to form primordial conductive airways, and the… …
