column length

symbol: $L$
https://doi.org/10.1351/goldbook.09898
Length of that part of the column tube that contains the stationary phase.
Source:
PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 190 (https://doi.org/10.1515/pac-2017-0111)