Found 2 items, similar to boron.
English → English (WordNet) Definition: boron 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]
English → English (gcide) Definition: Boron 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]