2B or 2-B may refer to:
==Science== IARC group 2B Type IIB string theory, a physical theory about the basic substance of the universe II-b or IIb, a subtype of Type II supernova Transcription factor II B, a type of protein structure Type IIb diamond, a classification of natural diamonds Alpha-2B adrenergic receptor, a type of protein structure
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).