PTM may refer to:
==Science and technology== Polynomial texture mapping, a digital imaging technique Post-translational modification, covalent and generally enzymatic modification of proteins following protein biosynthesis by ribosomes Post-transition metal, a grouping of chemical elements Probabilistic Turing machine, in theoretical computer science Pulse time modulation, a pulse modulation method
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).