a meaning

Article: a  u

1. Indefinite article, "an" is used before a vowel sound, "a" otherwise
   - an

Noun: a  u

1. The 1st letter of the Roman alphabet
   - A

Noun: A  ey

1. A metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
   - angstrom, angstrom unit
    
2. Any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
   - vitamin A, antiophthalmic factor, axerophthol
    
3. The blood group whose red cells carry the A antigen
   - type A, group A
    
4. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
   - adenine
    
5. One of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
   - deoxyadenosine monophosphate

Noun: Å

1. The basic unit of electric current adopted under the Système International d'Unités
   "a typical household circuit carries 15 to 50 amps"
   - ampere, amp

Derived forms: As

Type of: alphabetic character, base, blood group, blood type, current unit, fat-soluble vitamin, letter, letter of the alphabet, metric linear unit, nucleotide, purine

Part of: abamp, abampere, deoxyribonucleic acid, desoxyribonucleic acid, DNA, Latin alphabet, micromillimeter [US], micromillimetre [Brit, Cdn], millimicron, nanometer [US], nanometre [Brit, Cdn], nm, ribonucleic acid, RNA, Roman alphabet

Encyclopedia: A A, Vest-Agder A, You're Adorable A, Tranoy A, Norway A, Sweden A,a-trehalose phosphorylase A,b-unsaturated carbonyl compound A,a-phosphotrehalase A, a novel A, an A, Moskenes A, A Prime A, A novel A, A Novel A,N,N-TMT A, A' A, Lavangen A, Meldal A, Ibestad A, Afjord A, Andoy

[American slang]
Fig. very closely similar in appearance to someone else. (Typically: be ~; look like ~.)
  You are sure a dead ringer for my brother.
   Isn't he a ringer for Chuck?

[Architecture]
1.

Abbr. for ampere, a unit of electric current.

2.

Abbr. for area.

[Electricity]
See ampere

[Electronics]
1. Abbreviation of ATTO- (prefix).
2. Abbreviation of AREA.
3. Abbreviation of ACCELERATION.
4. Abbreviation of ANODE.
5. Obsolete abbreviation of cgs prefix AB-.

[Finance]
Fifth letter of a Nasdaq stock symbol specifying Class A shares.

[Law]
The first letter of the English and many other alphabets, frequently used as an abbreviation and also in the marks of schedules or papers, as schedule A, B, C,. Sometimes used in the ancient law books to denote that the paging is the first of that number in the book. As an abbreviation, A is used for anonymous.

Among the Romans this letter was used in criminal trials. The judges were furnished with small tables covered with wax, and each one inscribed on it the initial letter of his vote; A, when he voted to absolve the party on trial; C, when he was for condemnation; and N L, (non liquet) when the matter was unclear and he desired a new argument.

[Medicine]
abbr
1 about
2 absent
3 absolute
4 absorbency; absorbent
5 accommodation
6 acetum
7 acid; acidity
8 actin
9 active; activity
10 allergist; allergy
11 alpha
12 anode
13 answer
14 ante
15 anterior
16 aqua
17 area
18 artery
19 asymmetric; asymmetry
A
abbr
1 adenine
2 ampere
Å
symbol angstrom

Examples

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1. she rose and took a tentative step backward.
2. he asked a little about my life history.
3. he forced a laugh to his shaking lips.
4. bismarck ruled germany by a strong hand.
5. the resulting radiation is known as airglow.