(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

The principle that the parties in a transaction should be independent and on an equal footing, without any favorable treatment, fiduciary duties, etc.

A method of analysis applied to problems of wave propagation, stating that every point on a wavefront is itself the source of spherical wavelets, and the secondary wavelets emanating from different points mutually interfere.