retention time 

in chromatography
https://doi.org/10.1351/goldbook.R05364
See: hold-up volume (in column chromatography), relative retention (in column chromatography) (in column chromatography), retention factor (in column chromatography) (in column chromatography) (in column chromatography), retention index (in column chromatography) (in column chromatography) (in column chromatography) (in column chromatography), retention volumes (in column chromatography) (in column chromatography) (in column chromatography) (in column chromatography) (in chromatography), total retention volume (in column chromatography) (in column chromatography) (in column chromatography) (in column chromatography) (in chromatography) (in column chromatography)
Source:
PAC, 1993, 65, 819. 'Nomenclature for chromatography (IUPAC Recommendations 1993)' on page 841 (https://doi.org/10.1351/pac199365040819)