Word:

A

Pronunciation: named ā in the English, and most commonly ä in other languages
1.The first letter of the English and of many other alphabets. The capital A of the alphabets of Middle and Western Europe, as also the small letter (a), besides the forms in Italic, black letter, etc., are all descended from the old Latin A, which was borrowed from the Greek Alpha, of the same form; and this was made from the first letter ( ) of the Phœnician alphabet, the equivalent of the Hebrew Aleph, and itself from the Egyptian origin. The Aleph was a consonant letter, with a guttural breath sound that was not an element of Greek articulation; and the Greeks took it to represent their vowel Alpha with the ä sound, the Phœnician alphabet having no vowel symbols.
2.(Mus.) The name of the sixth tone in the model major scale (that in C), or the first tone of the minor scale, which is named after it the scale in A minor. The second string of the violin is tuned to the A in the treble staff. - A sharp (A$) is the name of a musical tone intermediate between A and B. - A flat (A$) is the name of a tone intermediate between A and G.
A per se
one preëminent; a nonesuch.
O fair Creseide, the flower and A per se
Of Troy and Greece.
- Chaucer.
1.An adjective, commonly called the indefinite article, and signifying one or any, but less emphatically.
2.In each; to or for each; as, "twenty leagues a day", "a hundred pounds a year", "a dollar a yard", etc.
prep.1.In; on; at; by.
2.In process of; in the act of; into; to; - used with verbal substantives in -ing which begin with a consonant. This is a shortened form of the preposition an (which was used before the vowel sound); as in a hunting, a building, a begging.
1.Of.
1.A barbarous corruption of have, of he, and sometimes of it and of they.
1.An expletive, void of sense, to fill up the meter
A merry heart goes all the day,
Your sad tires in a mile-a.
- Shak.
Noun1.A - the blood group whose red cells carry the A antigen
Synonyms: group A, type A
2.A - a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
3.A - any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
4.A - one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
5.A - (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
Synonyms: adenine
6.A - the basic unit of electric current adopted under the Systeme International d'Unites; "a typical household circuit carries 15 to 50 amps"
Synonyms: amp, ampere
7.A - the 1st letter of the Roman alphabet

A, the first letter of the English and most other alphabets, is frequently used as an abbreviation, (q.v.) and also in the marks of schedules or papers, as schedule A, B, C, &c. 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 did not appear clearly, and be desired a new argument.

antiophthalmic factor, axerophthol, dehydroretinol, fat-soluble vitamin, retinol, vitamin A, vitamin A1, vitamin A2
Browse
9/11
90
90-90 Rule
90th
91
92
93
94
95
95th
96
97
98
99
9PAC
9th
-- A --
A 1
A B C
A B C book
A baker's dozen
A battery
A beating wind
A bevel angle
A bill of adventure
a billion
a bit
a bit much
A blind boil
A block of shares
A bone of contention
A bone to pick
A buck of the first head
Index: # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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