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Key

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Ernst A.H., Swedish anatomist and physician, 1832-1901. See: foramen of Key-Retzius, sheath of Key and Retzius.
Farlex Partner Medical Dictionary © Farlex 2012

key

a character of special significance in an organism. Such characters are used in a system for determining the identity of an organism on the basis of the presence or absence of a succession of characters. Usually such keys are DICHOTOMOUS (2); that is to say, at each step there is a choice between two possibilities. Keys, however, may have more than two characters at each step and there is a gradual elimination of absent characters until identification is made.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Additionally, the company will preview new capabilities in Virtual Placement 7.3 -- such as an automatic chroma keyer for live, field-based sports that completely removes the need for rekeying.
(21.) Suna Ozabas-Turan, Cenk Aral, Levent Kabasakal, Meral Keyer Uysal and Julide Akbuga.
--Primatte Keyer for After Effects/ Combustion/Avid Xpress Pro $445
computer repairer) USA, Occupational Classification from the 1980 Census 64 Computer systems analyst and scientist 65 Operations and systems researcher and analyst 229 Computer programmer 233 Tool programmer, numerical control 304 Supervisor, computer equipment operator 308 Computer operator 309 Peripheral equipment operator 385 Data entry keyer 525 Data processing equipment repairer Source: Mason et al.
In 1978, Blue Cross/Blue Shield of South Carolina pioneered its "cottage keyer" project, which documented a 26% jump in productivity among telecommuting workers vs.
Zero Density's keyer has the ability to embed standard shadows coming from fixed real studio lights into a virtual set design, meaning a viewer cannot distinguish between a virtual and a physical set.
At booth N2516, Crystal Vision is also showing the keyers, video delays and fail-safe routing switches from its well-established Indigo frame system, including the acclaimed Safire 3 real-time chroma keyer.
If a code cannot be assigned automatically, the system displays a list of likely expenditure categories and the keyer makes a selection.
When working in Avid as opposed to our other systems, I like to try their built in Spectramatte keyer first.
For checks that were not clear, two new jobs were added: that of a keyer, who tried to decipher the amounts on unclear checks, and that of an image balancer, who balanced final deposits.
RGB Spectrum has introduced its new SynchroMaster 550 image combination system, which offers two alternative combining technologies; the first is a weighted sum of two inputs, the second offers a true linear RGB colour keyer able to blend a range of colours of the two inputs that provides enhanced results, especially when the foreground consists of shaded graphics or photo-realistic renderings.
Internal products include the Producer Pro from Magni Systems in Beaverton, Ore., which integrates an internal keyer and provides genlock circuitry.