\begin{definition}[Definition:Light Year/Symbol]
There are a number of symbols which are in use for the '''light year''':
:$\mathrm {ly}$ (as approved by the {{WP|International_Astronomical_Union|International Astronomical Union}})
:$\mathrm {l.y.}$  (the {{WP|ISO_80000|ISO 80000}} standard)
Language-specific versions can be seen in particular localities, for example:
:$\mathrm {al}$ in French (from '''''a''nnée-''l''umière'''), Spanish (from '''''a''ño ''l''uz''') and Italian (from '''''a''nno ''l''uce''')
:$\mathrm {Lj}$ in German (from '''''L''icht''j''ahr''')
Category:Definitions/Astronomical Distance Units
\end{definition}