stereochemistry (stÄr'Ä-Å-kÄm'Ä­-strÄ) The branch of chemistry that deals with the spatial arrangements of atoms in molecules and with the chemical and physical effects of these arrangements.
ECU. Short for Electronic Control Unit, the ECU is a name given to a device that controls one or more electrical systems in a vehicle. It operates much like the BIOS does in a computer.
East Central University. East Central University (shortened to ECU or East Central) is a public, co-educational teaching university located in Ada, in the south central region of the U.S. State of Oklahoma. East Central one of the six universities that are part of Oklahoma's Regional University System. Beyond its flagship campus is Ada, the university has courses available in McAlester, Shawnee, Ardmore, and Durant, as well as online courses.