B
/bi:/
Definition
- Noun:
- The second letter of the modern English alphabet: "B" is the second letter, following "A" and preceding "C".
- A symbol representing the second in a set or sequence: "B" is often used to denote the second item in a list, a secondary category, or a grade in academic evaluation.
- A musical note: In music, "B" is the name of a specific note, particularly in the fixed-do solfège system.
- A blood type: In the ABO blood group system, "B" is one of the major blood types.
Examples of Usage
- Noun:
- The word "book" starts with the letter B.
- She received a B on her history exam.
- The melody begins on the note B.
- His blood type is B positive.
Advanced Usage
- "Plan B": An alternative plan or course of action.
- If it rains, we'll have to go with Plan B for the picnic.
- "B-movie": A low-budget commercial movie, originally the second, less-prominent film in a double feature.
- They spent the evening watching old B-movies from the 1950s.
- "B-side": The secondary side of a vinyl single or cassette, typically featuring a song not released as the main single.
- The B-side of that single became more popular than the A-side.
Variants and Related Words
- B-flat (n): A musical note one semitone below B.
- B vitamin (n): Any of a group of water-soluble vitamins important for cell metabolism.
- B cell (n): A type of lymphocyte (white blood cell) involved in the humoral immune response.
Synonyms
- Second: Following immediately after the first in order.
- Beta: The second letter of the Greek alphabet, often used to denote a secondary version in software or products.
Related Phrases (Phrasal Verbs)
(Note: As a single letter, "B" does not form standard phrasal verbs. The following are common verb phrases where "B" is part of an abbreviation or fixed expression.) - To B and B (v): An informal abbreviation for "to bed and breakfast," meaning to stay at a bed and breakfast establishment. - We decided to B and B our way through the countryside.
Related Idioms
- To not know B from a bull's foot: To be completely ignorant or illiterate.
- He pretends to be an expert, but he doesn't know B from a bull's foot about car engines.
- From A to B: Referring to a basic journey from one point to another.
- This car is old, but it still gets me from A to B.
Noun
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the blood group whose red cells carry the B antigen
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the 2nd letter of the Roman alphabet
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(physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter
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a logarithmic unit of sound intensity equal to 10 decibels
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a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
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originally thought to be a single vitamin but now separated into several B vitamins
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aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
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