A-b meaning

The first letter of the English alphabet, called a and written in the Latin script.

Apple starts with A.

letter
0
0
The ordinal number first, derived from this letter of the English alphabet, called a and written in the Latin script.

The item A is "foods", the item B is "drinks".

numeral
0
0
The highest rank on any of various scales that assign letters.
  • Bond rating.

We assign each item inspected a rating from A through G, depending on various factors.

symbol
0
0
(education) The highest letter grade assigned (disregarding plusses and minuses).

I was so happy to get an A on that test.

symbol
0
0
(music) A tone three fifths above C in the cycle of fifths; the sixth tone of the C major scale; the first note of the minor scale of A minor; the reference tone that occurs at exactly 440 Hz; the printed or written note A; the scale with A as its keynote.

Orchestras traditionally tune to a concert A.

symbol
0
0
Advertisement
(medicine) A blood type that has a specific antigen that aggravates the immune response in people with type B antigen in their blood. They may receive blood from type A or type O, but cannot receive blood from AB or B.

My blood type is A negative.

symbol
0
0
(chemistry) Mass number.
symbol
0
0
(logic) A universal affirmative suggestion.
symbol
0
0
Acoustic source.
symbol
0
0
Actual weight of an aircraft.
symbol
0
0
Advertisement
(historical) Adulterer, adulteress.
symbol
0
0
Alaska Steamship Company.
symbol
0
0
Alcoa Steamship Company.
symbol
0
0
Allele dominant.
symbol
0
0
Alveolar gas.
symbol
0
0
Advertisement
American Stock Exchange.
symbol
0
0
Ammunition examiner.
symbol
0
0
Anchor Line.
symbol
0
0
Aspect ratio.
symbol
0
0
Assembly Bill.
symbol
0
0
Advertisement
Smallest of the brassiere cup sizes.
symbol
0
0
Chemical activity.
symbol
0
0
First van der Waals constant.
symbol
0
0
Fraunhofer line for oxygen.
symbol
0
0
(aviation) Hail.
symbol
0
0
Advertisement
(in newspaper stock listings) Includes extras.
symbol
0
0
Linear acceleration.
symbol
0
0
Mean sound absorption coefficient.
symbol
0
0
Shoe size narrower than B.
symbol
0
0
(baseball) Single A league, one of the lowest professional leagues.
symbol
0
0
Advertisement
Total acidity.
symbol
0
0
abbreviation
0
0
abbreviation
0
0
Adult; as used in film rating.
abbreviation
0
0
abbreviation
0
0
Advertisement
(physics) Angstrom.
abbreviation
0
0
abbreviation
0
0
(sports) An assist.
abbreviation
0
0
(weaponry) Atom; atomic.
abbreviation
0
0
(nautical) Able-bodied seaman.
initialism
0
0
Advertisement
Acid-base.

A/B testing.

initialism
0
0

Origin of a-b

  • From Middle English and Old English upper case letter A and split of Middle English and Old English upper case letter Æ.

    From Wiktionary

  • (highest rank, grade, music): From the initial position of the letter A in the English alphabet.

    From Wiktionary

  • (vehicle-distinguishing signs): From Australia

    From Wiktionary

  • (blood type): From A antigen

    From Wiktionary