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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 casting the process of forcing molten metal into a metallic mold under pressure to make castings. [2 definitions]
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 out to gradually disappear; fade. [2 definitions]
die press a large machine for cutting or stamping metal.
dieresis a diacritic mark, such as on this letter "o" (), placed over the second of two consecutive vowels to show that it is pronounced separately.
diesel shortened form of "diesel engine," a type of internal-combustion engine that burns fuel oil which is ignited by being sprayed into a chamber in which highly compressed air, rather than an electric spark, provides the heat. [3 definitions]
diesel engine a type of internal-combustion engine that burns fuel oil which is ignited by being sprayed into a chamber in which highly compressed air, rather than an electric spark, provides the heat.
diesinker a person or machine that makes stamping or shaping dies.
Dies Irae (Latin) a medieval hymn, and its opening words, describing the Judgment Day.
diesis see double dagger.
diestrus in a female mammal, the time between two periods of sexual heat.