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.
An Intensive Care Unit (ICU) is a special facility within a hospital that is dedicated to treating patients who are critically ill. The patients may be experiencing multiple organ failure, respiratory arrest, or other serious problems that require intensive monitoring.