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| dementia |
severe and irreversible deterioration of mental abilities, accompanied by emotional disturbances and caused by an organic disorder of the brain. [1/2 definitions] |
| entropy |
the natural and irreversible tendency toward randomness and disorder in any system without an external source of energy. [1/3 definitions] |
| fait accompli |
(French) a wholly completed deed or accomplishment, esp. one that appears irreversible and has been done without an affected person's prior knowledge. |
| primary cell |
a battery cell in which electric current is generated by an irreversible electrochemical reaction, and which therefore cannot be recharged efficiently. |
| time |
a nonspatial system in which events appear to happen in irreversible succession; arrangement of events into past, present, and future. [1/18 definitions] |
| voltaic cell |
a cell that contains two plates, or electrodes, of different metals which are immersed in an electrolyte solution, and in which an irreversible chemical reaction produces an electric current. |
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