repetition time

symbol: $T_{\rm{r}}$
initialism: TR
https://doi.org/10.1351/goldbook.08406
Time duration between repetitions of a nuclear magnetic resonance pulse sequence including the pulse sequence, acquisition time and relaxation delay.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 703 (https://doi.org/10.1515/pac-2019-0203)