| carnauba | (noun) Brazilian fan palm having an edible root; source of a useful leaf fiber and a brittle yellowish wax | Synonyms: carnauba palm, Copernicia cerifera, Copernicia prunifera, wax palm |
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| (noun) hard yellowish to brownish wax from leaves of the carnauba palm used especially in floor waxes and polishes | Synonyms: carnauba wax |
| eubacteria | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacterium, true bacteria |
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| eubacterium | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacteria, true bacteria |
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| imbauba | (noun) tropical American tree with large peltate leaves and hollow stems | Synonyms: Cecropia peltata, snake wood, trumpet-wood, trumpet tree, trumpetwood |
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| incubation | (noun) maintaining something at the most favorable temperature for its development | - |
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| (noun) sitting on eggs so as to hatch them by the warmth of the body | Synonyms: brooding |
| (noun) (pathology) the phase in the development of an infection between the time a pathogen enters the body and the time the first symptoms appear | - |
| incubator | (noun) apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants | Synonyms: brooder |
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| intubation | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulisation, cannulization, canulation, canulisation, canulization |
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| rhubarb | (noun) long pinkish sour leafstalks usually eaten cooked and sweetened | Synonyms: pieplant |
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| (noun) plants having long green or reddish acidic leafstalks growing in basal clumps; stems (and only the stems) are edible when cooked; leaves are poisonous | Synonyms: rhubarb plant |
| rubato | (noun) a flexible tempo; not strictly on the beat | - |
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| scuba | (noun) a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus | Synonyms: Aqua-Lung, aqualung |
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| subaltern | (noun) a British commissioned army officer below the rank of captain | - |
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| succuba | (noun) a female demon believed to have sexual intercourse with sleeping men | Synonyms: succubus |
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| troubadour | (noun) a singer of folk songs | Synonyms: folk singer, jongleur, minstrel, poet-singer |
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| tuba | (noun) the lowest brass wind instrument | Synonyms: bass horn, sousaphone |
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