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1388, "part for whole or vice versa," from M.L. synodoche, from L.L. synecdoche, from Gk. synekdokhe, lit. "a receiving together or jointly," from synekdekhesthai "supply a thought or word, take with something else," from syn- "with" + ek "out" + dekhesthai "to receive," related to dokein "seem good" (see
decent).