| pisanosaur | (noun) primitive dinosaur found in Argentina | Synonyms: pisanosaurus |
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| pisanosaurus | (noun) primitive dinosaur found in Argentina | Synonyms: pisanosaur |
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| piscary | (noun) a workplace where fish are caught and processed and sold | Synonyms: fishery |
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| pisiform | (noun) a small wrist bone that articulates only with the triquetral | Synonyms: os pisiforme, pisiform bone |
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| pismire | (noun) social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers | Synonyms: ant, emmet |
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| piss | (noun) informal terms for urination | Synonyms: pee, peeing, pissing |
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| (noun) liquid excretory product | Synonyms: pee, piddle, urine, water, weewee |
| pisser | (noun) a very disagreeable difficulty | - |
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| (noun) a person who urinates | Synonyms: urinator |
| pissing | (noun) informal terms for urination | Synonyms: pee, peeing, piss |
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| pistachio | (noun) nut of Mediterranean trees having an edible green kernel | Synonyms: pistachio nut |
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| (noun) small tree of southern Europe and Asia Minor bearing small hard-shelled nuts | Synonyms: pistachio tree, Pistacia vera |
| piste | (noun) a ski run densely packed with snow | - |
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| (noun) a flat rectangular area for fencing bouts | - |
| pistia | (noun) pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes | Synonyms: Pistia stratiotes, Pistia stratoites, water cabbage, water lettuce |
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| pistil | (noun) the female ovule-bearing part of a flower composed of ovary and style and stigma | - |
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| pistillode | (noun) a sterile vestigial pistil remaining in a staminate flower | - |
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| pistol | (noun) a firearm that is held and fired with one hand | Synonyms: handgun, shooting iron, side arm |
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| pistoleer | (noun) someone armed with a pistol (especially a soldier so armed) | - |
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| piston | (noun) mechanical device that has a plunging or thrusting motion | Synonyms: plunger |
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| pistonphone | (noun) an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. | - |
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