(ethics, philosophy) The ethical principle asserting that initiating physical force against persons or their justly acquired property, or threatening to do so, is illegitimate.

A method of interpretation of Bible prophecy in which the word day is considered to be symbolic of a year of actual time.

(evolutionary biology) A principle of asymmetry in selective pressure between predators and prey.

Alternative form of life-dinner principle

(philosophy) The proposition that nothing happens without a sufficient reason why it should be as it is and not otherwise.

(mathematics) A principle that gives a condition for finding the eigenvalues for a real symmetric matrix.

Synonym of principle of least astonishment

Synonym of principle of indifference

(physics) also known as the stationary action principle. In complex systems, the tendency for any movement or change to use the least action, and therefore amount of energy possible. This is true on a subatomic level, on the population level (evolution), and on a macro level. Not considered a law of physics because it is not true 100% of the time.

Is a principle referring to the idea that firms responsible for causing pollution should be charged the full external costs for the damage that it inflicts on society.