principal circle
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Circle line (London Underground) — Circle Colour on map Yellow Year opened 1884 Line type Sub Surface Rolling stock C Stock 6 carriages per trainset … Wikipedia
Circle Time — Circle Time, also called group time, refers to any time that a group of people are sitting together for an activity involving everyone. The method is now in widespread use in schools across the UK. In Scotland many primary schools use the method… … Wikipedia
Circle time — Circle time, also called group time, refers to any time that a group of people are sitting together for an activity involving everyone. The method is now in widespread use in schools across the UK. In Scotland many primary schools use the method… … Wikipedia
Circle line (métro de Londres) — Pour les articles homonymes, voir Circle line (homonymie). Circle Réseau Métro de Londres … Wikipédia en Français
Circle of latitude — Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are actually halves of great ellipses, with identical radii at a given latitude. Latitude (φ) Lines of latitude appear … Wikipedia
Circle bundle — In mathematics, an (oriented) circle bundle is an oriented fiber bundle where the fiber is the circle , or, more precisely, a principal U(1) bundle. It is homotopically equivalent to a complex line bundle. In physics, circle bundles are the… … Wikipedia
Circle (Alaska) — Pour les articles homonymes, voir Circle. 65° 50′ 04″ N 144° 04′ 35″ W … Wikipédia en Français
principal axis — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… … The Collaborative International Dictionary of English
Principal curvature — Saddle surface with normal planes in directions of principal curvatures In differential geometry, the two principal curvatures at a given point of a surface are the eigenvalues of the shape operator at the point. They measure how the surface… … Wikipedia
Circle of Willis — The circle of Willis is an arterial circle of critical importance at the base of the brain. It is called an arterial anastomosis, a joining of arteries. The circle of Willis receives all of the blood pumped up the two internal carotid arteries… … Medical dictionary
Principal meridian — Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS. A meridian is an imaginary line on the Earth s surface from the North Pole to the South Pole that connects all locations with a… … Wikipedia
