A pion torpedo was a type of torpedo weapon, named for the energy signature of the pion particle.

Pion torpedoes were utilized as starship weapons by the Orion civilization, outfitted onto such vehicles as their Corsair-class fighter-craft. (TOS video game: Shattered Universe)

torpedo weapons
fusion torpedo • gravimetric torpedo • kaon torpedo • Kessok torpedo • MIRV photon torpedo • phased plasma torpedo • photon torpedo • photonic torpedo • pion torpedo • plasma torpedo • polaron torpedo • quantum torpedo • spatial torpedo • transphasic torpedo • trilithium torpedo