Related Words

Directions: A term synonymous with progression. See Progressions.

Primary Directions: Originally, a mathematically complicated system of progressing a horoscope based upon the diurnal rotation of the Earth. The term is now loosely applied to any method of advancing house cusp . . . View Full Definition

Secondary Progressions, Secondary Directions: The method of progressing a natal horoscope in which each day after birth is equated to a corresponding number of years after birth; commonly referred to as 'day for a year' progressions.

Radar Reflector: A metal device designed for reflecting strong echoes of impinging radar signals towards their source. The corner reflector consists of three mutually perpendicular metal plates. Corner refle . . . View Full Definition

Bearing: Rollers and balls placed between moving parts to reduce friction and wear.

Selectable Direction Tracking: This mode of radar operation allows the operator to monitor targets that are only going toward the patrol vehicle, away from it, or in both directions. Example: decatur gvp-d police radar gu . . . View Full Definition

Turbulent Flow: An irregular state of fluid flow in which the particle paths cross one another and may even travel in opposing directions. (Compare with Laminar Flow.)

Back-Projection: a method of 3D reconstruction from 2D projections. It is based on superposing 3D functions ('back-projection bodies') obtained by translating the 2D projections along the directions of proje . . . View Full Definition

Paleocurrent Map: A map that shows the directions of currents at the time of sediment deposition. These directions can be determined through the study of cross bedding, ripple marks, tool marks and other sedi . . . View Full Definition

Dome: An uplift that is round or elliptical in map view with beds dipping away in all directions from a central point.