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arc (ärk)n. A curved line or segment of a circle.
ARC abbr. AIDS-related complex
A segment of a circle.
See electric arc.
Advanced RISC Computing Specification
1. An old archive format for IBM PC. The format is now so obscure that it is only likely to be supported by jack-of-all-trades decompression programs such as WINZIP. 2. An edge in a tree. "branch" is a generally more common synonym. (1998-12-29)