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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 ?
"Each year we have invested in various elements to improve the club and a second physio is a key move for us.
The company made a key move to a showroom space near the Fifth Ave.
A key move from the EU and strong progress over a refinancing deal has opened up the possibility that the ethanol plant could be back on line in a few months.
This key move will help improve operating efficiencies, shorten lead times and further strengthen the overall service provided to its rapidly expanding UK customer base.
Ericsson said the transaction was a key move in reinforcing and expanding the company's position in operation support systems and business support systems.
With such limited resources, the architect's key move was to make the most of the landscape through a clever reinterpretation of built form, substituting the traditional pillared hall in front, where people sit and pray, with a landscape glade or forest clearing.
'Centralising the storage of our products at Grocontinental has been a key move for us and has resulted in many improved efficiencies.
UK mortgage lender Northern Rock is set to remove the blanket guarantee on its deposits in a key move towards preparing for the sale of the nationalised bank, The Times has reported.
But one of his last presidential acts may stand the test of time as a key move in the conservation of marine ecosystems.
"The opening of a complete modern library with integrated IT facilities is a key move in UOWD's strategy to take the education standards and student facilities to the next level," said Professor Rob Whelan.- TradeArabia News Service
The opening of the Shanghai store is seen as a key move to cash in on a fast-growing Chinese economy amid the continuing credit crunch hitting its operations in Britain.
1 .d4 N16 2.Nf3 g6 3.Bf4 This is the key move of the London System which is not a sharp opening, but if Black is unwary he can be easily wiped out.