![]() Main articles: scribal abbreviation, medical abbreviation, and macron (diacritic) The macron is narrower than the character box. ![]() ![]() Marking one or more words with a continuous line above the characters is sometimes called overstriking, though overstriking generally refers to printing one character on top of an already-printed character.Īn overline, that is, a single line above a chunk of text, should not be confused with the macron, a diacritical mark placed above (or sometimes below) individual letters. In Latin, it indicates Roman numerals multiplied by a thousand and it forms medieval abbreviations ( sigla). The original use in Ancient Greek was to indicate compositions of Greek letters as Greek numerals. In old mathematical notation, an overline was called a vinculum, a notation for grouping symbols which is expressed in modern notation by parentheses, though it persists for symbols under a radical sign. JSTOR ( October 2009) ( Learn how and when to remove this template message)Īn overline, overscore, or overbar, is a typographical feature of a horizontal line drawn immediately above the text.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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