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). Figure in which an attribute or adjunct
is substituted for the thing meant ("head" for "cattle," etc.).