A test of blood flow to the male genitals to diagnose erectile dysfunction.  

A metabolite of tryptophan is found in normal urine, but appears in increased amounts in cases of vitamin B6 deficiency....

A small yellow plaque in the skin due to a fat deposit.  

A nitrogenous extractive contained in muscles tissue, liver, spleen, pancreas, and other organs and in the urine, formed during the...

A disease caused by a deficiency of vitamin A and characterized by a thickening and inflammation of the outer layers...

Not wanting to waste any of a chicken or turkey, many cooks will scrape and pluck the remaining pieces of...

Xenia, in ancient Greece and Rome, were table delicacies graciously presented to a tired stranger upon his or her arrival...

Xanthan is a gummy substance produced by a bacterium that takes its full scientific name—xanthomonas, Greek for yellow one—from the...

From the Greek word xenos, meaning "stranger." Xenotransplant is the implantation of an organ or limb from one species to...

The (theoretical) production of offspring that are genetically different from, and genotypically unrelated to either of the parents of that...