reglets

/ˈrɛɡlɪts/
noun
  1. Thin strips of wood or metal used in printing to create space between lines of type or between pages.
    • In old printing shops, reglets were carefully stored in boxes by size.
    • The typesetter used reglets to separate the columns of the newspaper.
    • The printer inserted reglets between the lines to make the text easier to read.
Synonyms
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