SPAD may refer to:
==Science and technology== Signal passed at danger by a train Simple Plastic Airplane Design, a type of radio-controlled model airplane Single-photon avalanche diode, a photodetector Single Pass Albumin Dialysis, liver dialysis SPAD (programming language), used by FriCAS symbolic algebra system
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).