Etymology
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escadrille (n.)

1893, from French escadrille, from Spanish escuadrilla, diminutive of escuadra "square, squad, squadron," from Vulgar Latin *exquadrare, from Latin quadrare "to make square," related to quadrus "a square," quattuor "four" (from PIE root *kwetwer- "four").

updated on April 27, 2017

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Definitions of escadrille from WordNet

escadrille (n.)
a small squadron;
escadrille (n.)
an air force squadron typically containing six airplanes (as in France during World War I);
From wordnet.princeton.edu, not affiliated with etymonline.