perchloric acid
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～ a powerful oxidizing agent; forms perchlorates
perchloride
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～ a chloride containing an unusually high proportion of chlorine
perchloromethane
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～ a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined
Percidae
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～ active freshwater fishes; true perches and pike perches
Perciformes
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～ one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
Percina
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～ a genus of Percidae
percipient
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～ a person who becomes aware (of things or events) through the senses
Percival Lowell
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～ United States astronomer whose studies of Mars led him to conclude that Mars was inhabited (1855-1916)
percoid fish
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～ any of numerous spiny-finned fishes of the order Perciformes
percoid
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～ any of numerous spiny-finned fishes of the order Perciformes
Percoidea
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～ in some classifications nearly or exactly equivalent to the Perciformes which are considered a suborder
percoidean
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～ any of numerous spiny-finned fishes of the order Perciformes
percolate
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～ the product of percolation
percolation
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～ the filtration of a liquid for extraction or purification
percolation
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～ the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava"
percolation
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～ the act of making coffee in a percolator
percolator
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～ a coffeepot in which boiling water ascends through a central tube and filters back down through a basket of ground coffee beans
Percomorphi
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～ one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
Percophidae
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～ percoid flatheads
percussion
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～ the section of a band or orchestra that plays percussion instruments