The Collaborative International Dictionary of English v.0.48:

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]

WordNet (r) 3.0 (2006):

boron
    n 1: a trivalent metalloid element; occurs both in a hard black
         crystal and in the form of a yellow or brown powder [syn:
         boron, B, atomic number 5]

The Elements (07Nov00):

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.


U.S. Gazetteer Places (2000):

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