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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| the offspring of a zebra and a donkey. |
| Main Entry: | closed system |
| Part of Speech: | n |
| Definition: | a complete and seemingly unchangeable set of doctrines, ideas, or things; a self-contained system that is unaffected by outside influences |
| closed system
A physical system that does not interact with other systems. A closed system obeys the conservation laws in its physical description. Also called isolated system. Compare open system. |