A balanced condition within a system of chemical reactions. When in chemical equilibrium, substances form and break down at the same rate, and the number of molecules of each substance becomes definite and constant.
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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a chattering or flighty, light-headed person. |
| chemical equilibrium | |
noun | |
| a chemical reaction and its reverse proceed at equal rates |