Etymology
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pointer (n.)

mid-14c., "a tiler" (early 13c. as a surname), agent noun from point (v.). From c. 1500 as "maker of needlepoint lace." From 1570s as "thing that points;" meaning "dog that stands rigid in the presence of game, facing the quarry" is recorded from 1717. Meaning "item of advice" is recorded by 1883.

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Definitions of pointer

pointer (n.)
a mark to indicate a direction or relation;
Synonyms: arrow
pointer (n.)
an indicator as on a dial;
pointer (n.)
(computer science) indicator consisting of a movable spot of light (an icon) on a visual display; moving it allows the user to point to commands or screen positions;
Synonyms: cursor
pointer (n.)
a strong slender smooth-haired dog of Spanish origin having a white coat with brown or black patches; scents out and points to game;
Synonyms: Spanish pointer
From wordnet.princeton.edu