[1275–1325; ‹ L ‹ Gk diáchylōn (something) made of juices, equiv. to dia- dia- + chylós juice (also Latinized as diachȳlum whence E sp. with -um); r. ME diaculon ‹ ML, and ME diaquilon ‹ MF, both ‹ LL diachȳlōn]This word is first recorded in the period 1275–1325. Other words that entered Englishat around the same time include: block, dress, issue, subject, traildia- is a prefix occurring in loanwords from Greek (diabetes; dialect) and used, in the formation of compound words, to mean “passing through” (diathermy), “thoroughly,” “completely” (diagnosis), “going apart” (dialysis), and “opposed in moment” (diamagnetism)