Category: D

A chemical that contains the Cr207 group.  

The property of appearing to be one color by direct light and another by transmitted light.  

An optical device used in some spectrophotometers to split a beam of light into reference and sample beams.  

Having two chorions. This may occur in two-egg (dizygotic) twins.  

Having two centers or two centromeres.  

Capable of neutralizing or accepting two hydrogen ions.  

A deep red color in urine, produced by the action of p-diazobenzenesulfonic acid and ammonia on aromatic substances found in the urine in certain conditions. A change in urine that can be observed in certain fever-causing illnesses, including typhoid fever, typhus, measles, and smallpox.  

A high-osmolarity, water-soluble contrast medium with the cation consisting of sodium during ionic dissociation. It is used to visualize various hollow body organs such as the kidney, bladder, uterus, and fallopian tubes.  

A high-osmolarity, water-soluble ionic contrast medium with the cation consisting of meglumine during ionic dissociation. It is used intra-arterially to visualize the arteries and veins of the heart and brain, great vessels such as the aorta, and the kidneys and bladder.  

One of a group of unicellular, microscopic algae, numerous in freshwater and saltwater. Its cell walls are made of silica.