squadron (formation) · a formation, now equivalent to a wing (RAF) or group (USAF), in earlier use (WWI) to a squadron · synonym of Schwadron (“formation of cavalry”)
çekim: çoğul Geschwadern · tamlayan Geschwaders
köken: 16th century, from ge- (collective prefix) + Schwader. The latter is from Middle High German swader, from Italian squadra. The sense “group of birds” (16th century and thus predating aviation) is derived from the cavalry use.
köken: From French escadron, possibly through Russian эскадрон (eskadron). Attested since the second half of the 19th century, according to Google Books analysis.
köken: From French escadre, Polish eskadra, Russian эска́дра (eskádra), German Eskader. Compare Spanish escuadra, Italian squadra. Doublet of eskadrono.