| binding energy | |
| —n | |
| 1. | the energy that must be supplied to a stable nucleus before it can undergo fission. It is equal to the mass defect |
| 2. | the energy required to remove a particle from a system, esp an electron from an atom |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |