Alacrity :: Alacrity (n.) A cheerful readiness, willingness, or promptitude; joyous activity; briskness; sprightliness; as, the soldiers advanced with alacrity to meet the enemy..
Algorithm :: Algorithm (n.) The art of calculating by nine figures and zero.
Algorithm :: Algorithm (n.) The art of calculating with any species of notation; as, the algorithms of fractions, proportions, surds, etc..
Alterity :: Alterity (n.) The state or quality of being other; a being otherwise.