Etymology

macron

ma·cron
M3A1C3R1O1N1

Today it means: A short, straight, horizontal diacritical mark (◌̄) placed over a letter, usually to indicate that the pronunciation of a vowel is long. Full definition →

First used 19th c.Ancient Greek μακρόν
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macron · noun1

  1. Ancient Greek · derived fromμακρόν
  2. English todaymacron

From Ancient Greek μακρόν (makrón), neuter form of μακρός (makrós, “long”) (English macro-).

Macron · proper noun2

  1. French · borrowed fromMacron
  2. French · borrowed fromMacron
  3. English todayMacron

Borrowed from French Macron.

First known use, by meaning

  • from 19th c. A short, straight, horizontal diacritical mark (◌̄) placed over a letter, usually to indicate that the pronunciation of a vowel is long.

Etymology from Wiktionary, CC BY-SA 4.0.