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actinium |
a radioactive chemical element of the rare-earth group that has eighty-nine protons in each nucleus. (symbol: Ac) |
adder's-tongue |
any of various ferns with a single sporeless leaflike frond and a slender spore-bearing spike or stalk that suggests a snake's tongue. [1/2 definitions] |
ammonium carbonate |
a white powder that is used in baking powder, smelling salts, and substances for fire-extinguishing. |
azurite |
a bright azure-blue mineral that serves as a copper ore. [1/2 definitions] |
bark3 |
a sailing ship with between three and five masts, all but one of which are square-rigged. |
barkentine |
a ship with three or more masts, square-rigged on the foremast, and fore-and-aft rigged on the others. |
beignet |
a square-shaped piece of fried dough topped with powdered sugar, sometimes filled with chocolate, cheese, fruit, or the like. [1/2 definitions] |
blockhouse |
a house made of square-cut logs. [1/3 definitions] |
botulinum |
a spore-forming bacterium (Clostridium botulinum) that produces botulin toxin under anaerobic conditions. |
brig |
a two-masted sailing vessel with square-rigged sails. [1/2 definitions] |
brigantine |
a two-masted sailing vessel with square-rigged sails on the front mast and a fore-and-aft mainsail. |
cerium |
a highly reactive chemical element of the rare-earth group that has fifty-eight protons in each nucleus and that occurs naturally only in compounds. (symbol: Ce) |
chimera |
a mythical fire-breathing female monster with a lion's head, a goat's body, and a snake's tail. [1/3 definitions] |
clostridium |
any of a genus of spore-forming, anaerobic bacteria, Clostridium, that inhabits soil or the intestinal tract of humans. |
coccus |
a sphere-shaped bacterium. |
cold storage |
storage in a temperature-controlled, usu. refrigerated container or room, as for furs or perishable foods or drugs. |
debenture |
a certificate issued by a custom house authorizing the refund of tariffs paid on imported goods that are re-exported. [1/2 definitions] |
dehisce |
to split open along a pre-existing line, as the seedpods of certain plants. |
didymium |
any mixture of rare-earth metals used commercially. [1/2 definitions] |
dragon |
a mythical animal that is usu. depicted as a monstrous, winged, fire-breathing reptile with claws and a long tail, often acting as a guardian of a place, treasure, or the like. [1/2 definitions] |
dysprosium |
a rare-earth metal chemical element of the lanthanide series that has sixty-sixprotons in each nucleus. (symbol: Dy) |
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