There are multiple definitions:

1. total lung capacity(English)

   • CAT, COPD, FEF25–75, FEV, FEV1, FRC, FVC, IRV, PFT, RV, TLCO, VA, RSP, SVC
   • Pulmonology
   • https://doi.org…0330-018-5659-9

2. thin-layer chromatography(English)

   • Abbreviation may be used in Am. Soc. Physiol. journals without definition.
   • Physiology

3. therapeutic lifestyle change(English)

   • Therapeutic approaches, Lifestyle

4. total lesion count(English)

   • ASI, AV, CDP, CS, SA, TRA
   • Dermatology, Scoring systems/scales
   • https://doi.org…0378-6323.51247