|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.|
dysgenic dys·gen·ic (dĭs-jěn'ĭk)
Relating to or causing the deterioration of hereditary qualities in offspring.