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. Erectile dysfunction (ED) is the inability of a man to attain and/or maintain an erection sufficient for sexual activity. The process leading to an erection is a complex interaction between physical and psychological factors. There have been great advances over the past twenty or so years in the diagnosis and treatment of erectile dysfunction. 1  Estimated 30 million men in the United States including over half of men between the age of 40 and 70 years old are affected by ED to some degree. 2  Erectile dysfunction is not normal at any age.