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English word
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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
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WORDNET DICTIONARY
Noun boron has 1 sense
- boron(n = noun.substance) atomic number 5, b - a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder; is a kind of chemical element, element
Derived forms adjective boric1, adjective boronic1
CIDE DICTIONARY
boron, n. [See Borax.].
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]
OXFORD DICTIONARY
boron, n. Chem. a non-metallic yellow crystalline or brown amorphous element extracted from borax and boracic acid and mainly used for hardening steel.
Usage
Symb.: B.
Etymology
BORAX + - on f. carbon (which it resembles in some respects)