| 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. |
rigidity ri·gid·i·ty (rĭ-jĭd'ĭ-tē)
n.
The quality or state of stiffness or inflexibility. Also called rigor.
An aspect of the personality characterized by resistance to change.