Definitions for "Keying"
The process of replacing part of one television image with video from another image; that is, chroma keying and insert keying.
The process of superimposing video from one source (the Foreground) on top of another source (the Background). A variety of key "types" are available in most switchers, including Self Key, Linear Key, Chroma Key, and Key Mask.
Layering of different picture elements using either a separate matte or by creating a matte using the luminance or chrominance content of the foreground image.
Keywords:  tumbler, alike, cylinders, pin, lock
The various keying arrangements for pin-tumbler cylinders: individual key – the key for an individual cylinder; keyed alike - all cylinders may be operated by the same key (not to be confused with master keyed); keyed different - a different individual key operates each cylinder (or group of cylinders); master key - a key to operate a group of cylinders, each of which may be set to a different individual key; master keyed - all cylinders in a group can be operated by one master key, although all cylinders may be keyed differently (not to be confused with keyed alike).
The way or order the different sized pins/tumblers are positioned inside a lock. The keying determines what keys will open the lock. See also Keying Alike
(n.) Any specification for how a cylinder or group of cylinders are or are to be combinated in order to control access. Source: Lock Industry Standards and Training (LIST) Council
A feature of a connector system that prevents physical mating where the service or orientation is incorrect. For example, keyed jacks may be used on all data connections to prevent plugging them into the phone system. Some networks, such as FDDI, have distinct keying guidelines and requirements.
A mechanical arrangement of guide pins, guide sockets, keying plugs, contacts, bosses, slots, keyways, inserts, or grooves in a housing, shell, or insert that allows connectors of the same size and type to be lined up side by side with no danger of making a wrong connection. Keying may also be accomplished by numbering the connectors and matching panel positions, or by using connectors of a different size or color. Under certain circumstances, keying and polarization may be combined in a connector design.
Devices that allow only selected pairs of mating connectors to be plugged into each other.
In a video system, the process of inserting one picture into another picture under spatial control of another signal, called keying the signal.
The generating of signals by the interruption or modulation of a steady signal or carrier.
1) The modulation of an analog signal to carry digital information. 2.) The interruption of a DC circuit for the purpose of Signaling information.
Combining proportional amounts of two frames, pixel by pixel, with optional opacity. This process resembles taking two panes of glass with images on them and placing one pane on top of the other. The opacity of the top pane determines the parts of the bottom pane that show. Usually, keying is a real-time continuous process, as in the "over the shoulder" graphics in TV news programs. The alpha component of each pixel, which defines its opacity, determines how the images are combined. Combining images based on the alpha component is often called alpha keying or luma keying. See also compositing and mixing.
In graphics and visual effects, keying is an informal term for compositing two full frame images together, by discriminating the visual information into values of color and light.
Keywords:  roughening, putty, lime, glue, grip
Roughening’ of the surface to give the glue greater surface area to grip.
scoring or roughing up the substrate surface to better accept the adhesive. lime putty
Keywords:  dummy, symbols, copy, letters, appear
The use of symbols, usually letters, to code copy that will appear on a dummy.
Keywords:  bending, kneeling, rest, knees, legs
Kneeling: Bending the legs at the knees to come to rest on the knee or knees.