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Encyclopedia > Subscript

A subscript is a number, figure, or indicator that appears below the normal line of type, typically used in a formula, mathematical expression, or description of a chemical compound. Probably the most famous example of a subscript is the number 2 in the formula for the molecule of water: H2O. A number is an abstract entity that represents a count or measurement. ... Figure can refer to any of the following: A persons figure. ... In mathematics and in the sciences, a formula is a concise way of expressing information symbolically (as in a mathematical or chemical formula), or a general relationship between quantities. ... An expression in the very basic sense is the noun form of the verb express. ... A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... In chemistry, a molecule is an aggregate of at least two atoms in a definite arrangement held together by special forces. ... Water (from the Old English waeter; c. ...


Typographically, subscripts are set with a lower baseline and a smaller size than the other text. For example, to set H2O correctly, the 2 should be about two-thirds the size of the H and the O. This is done automatically in many text editing and word processing programs (such as Microsoft Word). In typography and penmanship, the baseline is the line upon which most letters sit and under which descenders extend. ...

  • In HTML and Wiki syntax, subscript text is produced by putting it inside the tags <sub> and </sub>.
  • Unicode defines subscript characters such as ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₊ ₋ ₌ ₍ ₎ (&#8320 to &#8334).
  • In TeX's math mode (as used in MediaWiki), subscripts are typeset with the underscore _: $X_{ab}$ produces Xab.

An excerpt of HTML code with syntax highlighting In computing, HyperText Markup Language (HTML) is a markup language designed for the creation of web pages with hypertext and other information to be displayed in a web browser. ... Wikipedia is a Wiki, which means that anyone can easily edit any unprotected page and save those changes immediately to that page. ... Due to technical limitations, some web browsers may not display some special characters in this article. ... The TeX logo The TeX mascot, by Duane Bibby ΤΕΧ, written as TeX in plain text, is a typesetting system created by Donald Knuth. ... MediaWiki is a Wiki software package licensed under the GNU General Public License. ... The underscore _ is the character with ASCII value 95. ...

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