key

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Key

(),
Ernst A.H., Swedish anatomist and physician, 1832-1901. See: foramen of Key-Retzius, sheath of Key and Retzius.

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.
References in periodicals archive ?
The Philippines tried to build shelters for fishermen in Sandy Cay in 2017 but it was stopped after China protested it, citing an agreement not to occupy new features.
The rat-like Bramble Cay melomys lived on a tiny island at the top of the Great Barrier Reef and had not been seen in a decade (AFP / MANILA BULLETIN)
Vivian Bell (Helen Shaver) and Cay Riwers (Patricia Charbonneau).
Bramble Cay melomys are believed to have been endemic to Bramble Cay, a small coral island off the north coast of Queensland, Australia with a maximum elevation of three meters above sea level.
The cay has been exploited for its biological and phosphatic rock resources since the mid-19th century, and was home to a continuous succession of navigational beacons and lighthouses since the early 1900s.
corniger on Treasure Cay was about 40 ha, based on the area of the polygon joining the active sites that form the infestation perimeter.
The long-tailed, rat-like animal, called the Bramble Cay melomys, is considered the only mammal that inhabited the reef.
Staniel Cay is about 125 kilometers southeast of Nassau, the Bahamian capital.
The renewable energy system at Over Yonder Cay has proved very popular with guests of the exclusive island resort.
The Bird Cay property includes over 4.75 miles of water frontage, sandy beaches, clear waters, panoramic ocean views, moderate breezes, numerous trails, tropical palms and casuarinas plants, as well as citrus and coconut groves that give the island a unique appeal.
But since I was looking to "have it all" and "get away from it all," I decided to check out Hawks Cay on Duck Key.