(medicine) The lowest pharmaceutical dosage required to cause effect in 50% of average individuals.

plural of effective energy

plural of effective dose

(engineering) A phenomenon where high pressure inside a pipe causes it to buckle.

A philosophy and social movement that advocates the use of evidence and reasoning to determine the most effective ways to benefit others.

plural of effective altruist

(ethics, philosophy) A proponent of effective altruism ("a philosophy and social movement that advocates the use of evidence and reasoning to determine the most effective ways to benefit others").

(radio) the energy of a radio frequency, determined by multiplying the transmitter power output with the antenna gain.

(poker) The maximum amount of chips in one's stack that is able to be wagered, after all the possible bets, raises and reraises.

plural of effective stack size