Definition Dictionary

To strive to equal or surpass a model through imitation.

Either of the two annual times when the Sun appears to cross the celestial equator, with day and night approximately equal in length.

Equal or corresponding in value, meaning, effect, or function.

Changing by a constant proportional factor over equal intervals, or relating to a quantity expressed with an exponent.

A model that reduces the present value of a future outcome by the same proportional factor for each equal unit of delay.