Definition of B

1. Noun. Aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil.

2. Noun. Originally thought to be a single vitamin but now separated into several B vitamins.

3. Noun. A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.
Exact synonyms: Atomic Number 5, Boron
Generic synonyms: Chemical Element, Element
Substance meronyms: Borax, Kernite
Derivative terms: Boric, Boronic

4. Noun. A logarithmic unit of sound intensity equal to 10 decibels.
Exact synonyms: Bel
Generic synonyms: Sound Unit

5. Noun. (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter.
Exact synonyms: Barn
Category relationships: Atomic Physics, Nuclear Physics, Nucleonics
Generic synonyms: Area Unit, Square Measure

6. Noun. The 2nd letter of the Roman alphabet.

7. Noun. The blood group whose red cells carry the B antigen.
Exact synonyms: Group B, Type B
Generic synonyms: Blood Group, Blood Type

Definition of B

1. Letter. (Latn-def en letter 2 bee) ¹

2. Number. (Latn-def en ordinal 2 bee) ¹

3. Abbreviation. (cricket) the number of balls faced by a batsman ¹

4. Abbreviation. The quantity one billion (1,000,000,000), usually used to signify a sum of money ¹

5. Abbreviation. (British) The grade of pencil that makes darker marks than grade HB but lighter marks than grade 2B; a pencil with soft lead. ¹

6. Abbreviation. (chess) bishop Bishop ¹

7. Noun. A personality type of someone who is relaxed and easygoing and able to engage in leisure activities without worrying about work. ¹

8. Noun. An academic grade, better than a C and worse than an A ¹

9. Noun. Signifies a second-tier or second class of a given commodity, group, or category, as in B-movie, B-list, etc. ¹

10. Noun. Alternate or secondary part, as the back side of a phonograph record. Contrasted with '''A''', which is the primary part. ¹

11. Noun. (music) The seventh note in the w:C major C major scale. ¹

12. Symbol. (computing) byte ¹

13. Letter. (Latn-def en letter 2 bee) ¹

14. Number. (Latn-def en ordinal 2 bee) ¹

15. Abbreviation. (alternative form of b.) ¹

16. Symbol. (astronomy) latitude in the galactic coordinate system ¹

17. Symbol. (physics) barn ¹

18. Symbol. (computing) bit ¹

19. Symbol. (cricket) bye ¹

¹ Source:

Medical Definition of B

1. 1. Symbol for boron; for aspartic acid or asparagine when it is unclear which of the two amino acids is present; for bromouridine; second substrate in a multisubstrate enzyme-catalyzed reaction. 2. As a subscript, refers to barometric pressure. 3. In chemistry, denotes the second in a series, the second carbon from a functional (e.g., carboxylic) group, or the direction of a chemical bond toward the viewer. For terms having this prefix, see the specific term. (05 Mar 2000)

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Lexicographical Neighbors of B

b (current term)
b-complex vitamin
b-lymphocyte subsets

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