|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|glyceraldehyde (glĭs'ə-rāl'də-hīd') Pronunciation Key
A sweet colorless syrupy liquid that is an intermediate compound in carbohydrate metabolism. Chemical formula: C3H6O3.