Akademik

conservation
1. Preservation from loss, injury, or decay. 2. In sensorimotor theory, the mental operation by which an individual retains the idea of an object after its removal in time or space. [L. conservatio, a preserving, keeping]
- c. of energy the principle that the total amount of energy in a closed system remains always the same, none being lost or created in any chemical or physical process or in the conversion of one kind of energy into another, within that system.

Medical dictionary. 2011.