| 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. |
cognition cog·ni·tion (kŏg-nĭsh'ən)
n.
The mental faculty of knowing, which includes perceiving, recognizing, conceiving, judging, reasoning, and imagining.
| cognition (kŏg-nĭsh'ən) Pronunciation Key
The mental process of knowing, including awareness, perception, reasoning, and judgment. |