Descriptor

Numerical representation of a molecular property, including bulk properties (e.g. log P, molecular weight), two-dimensional (2-D) features (atom connectivity`s) or three-dimensional (3-D) features (molecular shape). A complete set of descriptors comprises a fingerprint.
Found on http://www.combichemistry.com/glossary_d.html

descriptor

noun a piece of stored information that is used to identify an item in an information storage and retrieval system
Found on http://wordnetweb.princeton.edu/perl/webwn?s=descriptor

Descriptor

A variable describing assets, used as an element of a risk index. For example, a volatility risk index, distinguishing high volatility assets from low volatility assets, could consist of several descriptors based on short term volatility, long term volatility, systematic and residual volatility, etc.
Found on http://www.duke.edu/~charvey/Classes/wpg/bfglosd.htm

descriptor

an index term used to identify a record in a database. It can consist of a word, phrase, or alphanumerical term. It can describe the content of the record or be an arbitrary code. When a descriptor is descriptive, it can be an effective search parameter.
Found on http://en.wikipedia.org/wiki/Glossary_of_information_science_terms

Descriptor

Numerical representation of a molecular property, including bulk properties (e.g. log P, molecular weight), two-dimensional (2-D) features (atom connectivity`s) or three-dimensional (3-D) features (molecular shape). A complete set of descriptors comprises a fingerprint.
Found on http://www.combichemistry.com/glossary_d.html

descriptor

Any object that defines the methods __get__(), __set__(), or __delete__(). When a class attribute is a descriptor, its special binding behavior is triggered upon attribute lookup. Normally, writing a.b looks up the object b in the class dictionary for a, but if b is a descriptor, the defined method gets called. Understanding descriptors is a key to...
Found on https://wiki.python.org/moin/PythonGlossary
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