a book containing useful facts or specially organized information, as an encyclopedia, dictionary, atlas, yearbook, etc.
Also called pass, passbook. South African. a domestic identity document carried by black citizens.
reference book
a book, such as an encyclopedia, dictionary, etc, from which information may be obtained
(South African) another name for passbook (sense 4)

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  • Reference counting

    programming A garbage collection technique where each memory cell contains a count of the number of other cells which point to it. If this count reaches zero the cell is freed and its pointers to other cells are followed to decrement their counts, and so on recursively. This technique cannot cope with circular data structures. […]

  • Referenced

    noun 1. an act or instance of referring. 2. a mention; allusion. 3. something for which a name or designation stands; denotation. 4. a direction in a book or writing to some other book, passage, etc. 5. a book, passage, etc., to which one is directed. 6. reference mark (def 2). 7. material contained in […]

  • Reference-electrode

    noun, Physical Chemistry. 1. an electrode of known oxidation potential used in determining the electromotive force of a galvanic cell.

  • Reference-frame

    noun, Physics. 1. frame of reference (def 2). reference frame (rěf’ər-əns) A basis of a four-dimensional coordinate system in which the first coordinate is understood as a time coordinate, while the other three coordinates represent spatial dimensions. Inertial frames and non-inertial frames are both examples of reference frames. Also called frame of reference. See also […]

  • Reference-group

    noun, Sociology. 1. a group with which an individual identifies and whose values the individual accepts as guiding principles. noun in sociology, a group with which one identifies and shares attitudes, beliefs, or ideals; also, a group which a person hopes to join

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