A special photographic film with a sensitive emulsion layer that blackens in response to the light from intensifying screens. The...

A drug that constricts blood vessels. It acts rapidly and is long-lasting and is applied topically as a nasal decongestant...

A liquid used for increasing the transparency of tissues prepared for microscopic examination after they have been dehydrated.  

A genus of tropical and subtropical fleas, with some 40 species. The rat flea, X. cheopis, occasionally attacks man and...

A procedure for diagnosing infections transmitted by insect carriers. Uninfected insects of the species known to carry the disease in...

Excess of the purine derivative xanthine in the urine, usually the result of an inborn defect of metabolism. It is...

The presence in the blood of the yellow pigment carotene, from excessive intake of carrots, tomatoes, or other vegetables containing...

Using an x-ray source which projects through the patient onto a fluorescent screen or image intensifier. Image-intensified fluoroscopy has replaced...

A trait associated with a gene on the X sex chromosome. Any trait associated with a gene on the X...

A test done to determine the rate of absorption of xylose, a wood sugar, into blood. Absorption is impaired in...