Stereochemistry definition, the branch of chemistry that deals with the determination of the relative positions in space of the atoms or groups of atoms in a compound and with the effects of these positions on the properties of the compound. Origin of stereochemistry.
The Ed.D. is a doctoral degree in education. 1  Similar to the Ph.D., doctor of philosophy that is awarded in all disciplines, the Ed.D. entails several years of study and the completion of doctoral (and sometimes master's) comprehensive exams as well as a dissertation.
Erectile dysfunction (ED) is the inability to get or keep an erection firm enough to have sexual intercourse. It is also sometimes also referred to as impotence. Occasional ED is not uncommon. Many men experience it during times of stress. However, frequent ED can be a sign of health problems that need treatment.