Толковый словарь английского языка Oxford English Reference - trans-

prefix. 1 across, beyond (transcontinental; transgress). 2 on or to the other side of (transatlantic) (opp. CIS-). 3 through (transonic). 4 into another state or place (transform; transcribe). 5 surpassing, transcending (transfinite). 6 Chem. a (of an isomer) having the same atom or group on opposite sides of a given plane in the molecule (cf. CIS- 4). b having a higher atomic number than (transuranic). Etymology: from or after L trans across