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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| cryogenics (krī'ə-jěn'ĭks) Pronunciation Key
The scientific study of how matter behaves at very low temperatures, sometimes approaching absolute zero, and how such temperatures can be achieved and maintained. See also superconductivity, superfluid. |
The branch of technology concerned with the behavior of materials at very low temperatures, particularly temperatures near absolute zero.