Boron

5 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Boron \Bo"ron\ (b[=o]"r[o^]n), n. [See {Borax}.] (Chem.)
     A nonmetallic element occurring abundantly in borax. It is
     reduced with difficulty to the free state, when it can be
     obtained in several different forms; viz., as a substance of
     a deep olive color, in a semimetallic form, and in colorless
     quadratic crystals similar to the diamond in hardness and


     other properties. It occurs in nature also in boracite,
     datolite, tourmaline, and some other minerals. Atomic number
     5. Atomic weight 10.81. Symbol B.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  boron
       n : a trivalent metalloid element; occurs both in a hard black
           crystal and in the form of a yellow or brown powder [syn:
            {B}, {atomic number 5}]

From Elements database 20001107 [elements]:

  boron
  Symbol: B
  Atomic number: 5
  Atomic weight: 10.811
  An element of group 13 of the periodic table. There are two allotropes,
  amorphous boron is a brown power, but metallic boron is black. The
  metallic form is hard (9.3 on Mohs' scale) and a bad conductor in room
  temperatures. It is never found free in nature. Boron-10 is used in
  nuclear reactor control rods and shields. It was discovered in 1808 by Sir
  Humphry Davy and by J.L. Gay-Lussac and L.J. Thenard.
  
  

From U.S. Gazetteer (1990) [gazetteer]:

  Boron, CA (CDP, FIPS 7568)
    Location: 35.00492 N, 117.65034 W
    Population (1990): 2101 (937 housing units)
    Area: 7.6 sq km (land), 0.0 sq km (water)
    Zip code(s): 93516

From U.S. Gazetteer Places (2000) [gaz-place]:

  Boron, CA -- U.S. Census Designated Place in California
     Population (2000):    2025
     Housing Units (2000): 1103
     Land area (2000):     13.848524 sq. miles (35.867512 sq. km)
     Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
     Total area (2000):    13.848524 sq. miles (35.867512 sq. km)
     FIPS code:            07568
     Located within:       California (CA), FIPS 06
     Location:             35.015177 N, 117.660799 W
     ZIP Codes (1990):     93516
     Note: some ZIP codes may be omitted esp. for suburbs.
     Headwords:
      Boron, CA
      Boron