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| boron (Borium) | |||
| boron A very hard almost colourless crystalline metalloid element that in impure form exists as a brown amorphous powder. It occurs principally in borax and is used in hardening steel | |||
| boron | |||
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boro : 83 phrases in 16 subjects |
| |||
| boron (Borium) | |||
| boron A very hard almost colourless crystalline metalloid element that in impure form exists as a brown amorphous powder. It occurs principally in borax and is used in hardening steel | |||
| boron | |||
|
boro : 83 phrases in 16 subjects |