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| to restore or reduce to the natural or uncombined state, such as a metal |
| a vessel, commonly a glass bulb with a long neck bent downward, used for distilling or decomposing substances by heat |
boron bo·ron (bôr'ŏn')
n.
Symbol B
A soft, amorphous or crystalline nonmetallic element, used in flares and nuclear reactor control rods. Atomic number 5; atomic weight 10.811; melting point 2,075°C; sublimation point 2,550°C; specific gravity (crystal) 2.34; valence 3.
| boron (bôr'ŏn') Pronunciation Key
Symbol B A shiny, brittle, black metalloid element extracted chiefly from borax. It is a good electrical conductor at high temperatures and a poor conductor at low temperatures. Boron is necessary for the growth of land plants and is used in the preparation of soaps, abrasives, and hard alloys. It is also used in the control rods of nuclear reactors as a neutron absorber. Atomic number 5; atomic weight 10.811; melting point 2,300°C; sublimation point 2,550°C; specific gravity (crystal) 2.34; valence 3. See Periodic Table. |