|biochem a glycoprotein, secreted by the stomach, the presence of which is necessary for the absorption of cyanocobalamin (vitamin B12) in the intestine|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a chattering or flighty, light-headed person.|
intrinsic factor n.
A relatively small mucoprotein secreted by the parietal cells of gastric glands and required for adequate absorption of vitamin B12 for production of red blood cells. Also called Castle's intrinsic factor.