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nounperennial of wet and marshy places in the northern hemisphere: water parsnips
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- y a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
- powder a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
- davy English chemist who was a pioneer in electrochemistry and who used it to isolate elements sodium and potassium and barium and boron and calcium and magnesium and chlorine (1778-1829)
- sima rock that form the continuous lower layer of the earth's crust; rich in silicon and magnesium
- gunpowder a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
- huxley English physiologist who, with Alan Hodgkin, discovered the role of potassium and sodium ions in the transmission of the nerve impulse (born in 1917)
- talcum a fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powder
- alum a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
- alum a double sulphate of aluminum and potassium that is used as an astringent (among other things)
- gelignite a type of dynamite in which the nitroglycerin is absorbed in a base of wood pulp and sodium or potassium nitrate