There are multiple definitions:

1. tubulin tyrosine ligase(English)

2. Time-to-Toxicity approach for Liquids(English)

   • capable to distinguish chemicals that do not require classification for serious eye damage/eye irritation from chemicals that require such classification
   • Toxicology, Ophthalmology
   • https://doi.org…tiv.2020.104960

3. transcriptional translational feedback loop(English)

   • LD, SCN
   • Transcription, Circadian rhythm
   • https://doi.org…528.2011.607374

4. total tumoral load(English)

   • may refer to prediction of non-sentinel lymph node metastasis in early breast cancer
   • BC, OSNA, SLN
   • Mammary gland, Oncology, Surgery
   • https://doi.org…jso.2013.03.011