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Definition of Boron
1. Noun. A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.
Generic synonyms: Chemical Element, Element
Substance meronyms: Borax, Kernite
Derivative terms: Boric, Boronic
Definition of Boron
1. n. 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 weight 10.9. Symbol B.
Definition of Boron
1. Noun. The chemical element (''symbol'' B) with an atomic number of 5; a metalloid ¹
¹ Source: wiktionary.com
Definition of Boron
1. a nonmetallic element [n -S] : BORONIC [adj]
Medical Definition of Boron
1.