There are multiple definitions:

1. operational taxonomic unit(English)

   • used to categorize bacteria based on sequence similarity
   • ASV, BMI, CNS, DI, FFAR, fMRI, FWE, GI, GIP, GLP-1, HOMA-IR, iAUC, IGI, OFC, OGIS, RMR, SCFA, SMMT, T2DM, VAS, BMDM, CA, FLICA, GF, HDAC, IL-1, IVIG, KD, LCWE, PCoA, PCOS, SPF, TJ
   • Bacteriology, Genomics, Metabolism, Adiposity, Microbiome
   • https://doi.org…biofilms.2016.4
   • https://doi.org…sci.2023.108478
   • https://doi.org…SAHA.124.325079
   • https://doi.org…76.2022.2085961

2. ovarian tumor protease(English)

   • OTUD7B
   • Ovary and uterus, Oncology
   • https://doi.org…55/2022/2836128