English Reference Dictionary Lookup


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Defintion of atomic number 5, B, boron. (n):
A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.

Defintion of B, bacillus. (n):
Aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil.

Defintion of B, B complex, B vitamin, B-complex vitamin, vitamin B, vitamin B complex. (n):
Originally thought to be a single vitamin but now separated into several B vitamins.

Defintion of B, Bel. (n):
A logarithmic unit of sound intensity equal to 10 decibels.

Defintion of b, barn. (n):
(physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter.

Defintion of B, b. (n):
The 2nd letter of the Roman alphabet.

Defintion of B, b. (n):
The 2nd letter of the Roman alphabet.

Defintion of B, group B, type B. (n):
The blood group whose red cells carry the B antigen.