An Etymological Dictionary of Astronomy and Astrophysics

Unusual, not expected, extraordinary. → strange particle.

Etymology (EN): M.E., from O.Fr. estrange “foreign, alien,” from L. extraneus “foreign, external,” from extra “outside of,” → extra-.

Etymology (PE): Šegeft, from Mid.Pers. škaft, škift, škuft “strange, wonderful, amazing;” Av. skapta- “wonderful.”