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alterant resulting in or producing alteration. [2 definitions]
alteration the state or process of altering. [3 definitions]
alterative tending to alter or cause alteration.
altercate to argue heatedly; quarrel.
altercation a loud or angry argument or quarrel.
alter ego a second self or another aspect of oneself. [2 definitions]
alternate to continuously rotate or take turns with one another (usu. fol. by "with"). [9 definitions]
alternate angles a pair of nonadjacent angles that are formed on opposite sides of a line where it crosses two others transversely.
alternating current electrical current that reverses direction at regular intervals. (Cf. direct current.)
alternation the act or process of alternating. [2 definitions]
alternative one of two or more possibilities; option. [5 definitions]
alternative energy any form of energy other than that which comes from fossil fuel.
alternative energy source any source of energy other than fossil fuel.
alternative fuel a fuel other than fossil fuel used to power an internal combustion engine.
alternative medicine any medical treatment or therapy, such as homeopathy and acupuncture, that is considered nontraditional and is generally not taught in conventional medical schools.
alternator a generator which produces alternating electrical current.
althea any of a group of plants having tall spikes of flowers, such as hollyhocks.
Althea Gibson U.S. professional tennis player, who was the first African-American woman to win all the major world singles tennis titles (b.1927--d.2003).
althorn any of various brass wind instruments in the alto or tenor range, esp. the altosaxhorn; alto horn.
although in spite of the fact that; even though; though.
altimeter an altitude-measuring device such as a specially calibrated barometer.