BTB may refer to:
In biology: Blood–testis barrier in testicular anatomy Blood–thymus barrier bTB, bovine tuberculosis or Mycobacterium bovis, a disease in cattle Breakthrough bleeding, of the menstrual period Bromothymol blue, a chemical indicator for weak acids and bases BTB/POZ domain, a protein domain
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).