litre

https://doi.org/10.1351/goldbook.L03594
Non-SI unit of volume, \(\text{L} = 10^{-3}\ \text{m}^{3}\). The other allowed symbol is \(\mathrm{l}\).
Source:
Green Book, 2nd ed., p. 111 [Terms] [Book]
See also:
PAC, 1986, 58, 1405. (Recommendations for the presentation of thermodynamic and related data in biology (Recommendations 1985)) on page 1407 [Terms] [Paper]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 979 [Terms] [Paper]