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didactics (used with a sing. verb) the science or art of teaching; pedagogy.
diddle1 (informal) to cheat or swindle. [2 definitions]
diddle2 (informal) to jerk or move rapidly back and forth or up and down; jiggle.
didn't contracted form of "did not."
Dido in the ancient Roman epic poem The Aeneid by Virgil, the queen of Carthage who detains Aeneas, then kills herself after he abandons her. [2 definitions]
didymium a rare metal, once considered an element, consisting of the elements neodymium and praseodymium. [2 definitions]
die1 to stop living; become dead. [4 definitions]
die2 an instrument used for forming, cutting, or stamping material such as metal or plastic. [3 definitions]
die3 a small block with six square sides. Each side has between one and six marks on it. Dice are used in many games.
die away of a sound, to reduce in volume gradually.
die casting the process of forcing molten metal into a metallic mold under pressure to make castings. [2 definitions]
die down to lessen in intensity; to come close to ending or being extinguished.
dieffenbachia any of various poisonous tropical plants, grown as houseplants, characterized by fleshy jointed stems and large dark green leaves with white spots.
die-hard a person who stubbornly refuses to accept defeat or change, abandon a position, or the like. [2 definitions]
dieldrin a highly poisonous, long-lasting insecticide.
dielectric a substance that does not conduct electricity; insulator. [2 definitions]
dielectric heating the heating of electrically nonconducting materials by exposure to a high-frequency, alternating electromagnetic field, as in the production of plywood.
diencephalon the rearmost portion of the forebrain.
die off (of animals or plants) to die one after another, gradually decreasing the total number within a population.
die out to gradually disappear; fade. [2 definitions]
die press a large machine for cutting or stamping metal.