thin space

== English == === Etymology === From thin +‎ space. First use appears c. 1683 in the writings of Joseph Moxon. === Noun === thin space (plural thin spaces) (letterpress typography) A metal block used to separate words, one fifth of an em in width. Synonyms: 5-to-the-em space, 5-em space Coordinate terms: thick space; em space, en space, word space (typography) In digital text, a character representing a thin space. Synonyms: 5-to-the-em space, 5-em space Coordinate terms: thick space; em space, en space, no-break space, word space, zero-width space 2002, Robert Bringhurst, The Elements of Typographic Style (version 2.5), Vancouver, Hartley & Marks, →ISBN, p 43: All you may see on the keyboard is a space bar, but typographers use several invisible characters: the word space, fixed spaces of various sizes (em space, en space, thin space, figure space, etc) and a hard space or no-break space. === Anagrams === cathepsin, pinches at