the principle that in a system that does not undergo any force from outside the system, the amount of energy is constant, irrespective of its changes in form.
the principle that the total energy of any isolated system is constant and independent of any changes occurring within the system
apparently coined in French by Leibnitz in 1692; attested in English from early 18c. as conservatio virum vivarum or partially nativized versions of it. The exact phrase is attested from 1853.
conservation of energy
A principle stating that the total energy of a closed system remains constant over time, regardless of other possible changes within the system. It is related to the symmetry of time invariance. See also invariance, thermodynamics.
noun, Physics. 1. . noun, Physics. 1. the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed. noun 1. the principle that the total mass of any isolated system is constant and is independent […]
- Law of contiguity
law of contiguity n. The principle that when two ideas or psychologically perceived events have once occurred in close association, they are likely to occur in close association again, the subsequent occurrence of one tending to elicit the other.
noun, Logic. 1. the law that a proposition cannot be both true and false or that a thing cannot both have and not have a given property.
noun, Trigonometry. 1. a law stating that the square of a side of a plane triangle is equal to the sum of the squares of the other two sides minus twice the product of the other sides multiplied by the cosine of the angle between them. 2. a law stating that the cosine of an […]