a

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Related to A diaeresis: Trema, Diaereses

A,

first letter of the alphabetalphabet
[Gr. alpha-beta, like Eng. ABC], system of writing, theoretically having a one-for-one relation between character (or letter) and phoneme (see phonetics). Few alphabets have achieved the ideal exactness.
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. A is a usual symbol for a low central vowel, as in father; the English long a (ā) is pronounced as a diphthong of ĕ and y. The corresponding letter of the Greek alphabet is named alpha. Alpha and omega, the last letter of the Greek alphabet, symbolize the beginning and the end and, in the New Testament, Christ. In musical notationmusical notation,
symbols used to make a written record of musical sounds.

Two different systems of letters were used to write down the instrumental and the vocal music of ancient Greece. In his five textbooks on music theory Boethius (c.A.D. 470–A.D.
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 the letter is the symbol of a note in the scale.

a

(electricity)
(physics)

A

(electricity)
(mechanics)

Å

(mechanics)

A

1. Abbr. for ampere, a unit of electric current.
2. Abbr. for area.

dB(A)

A unit of sound-level; a reading taken on the A-scale of a sound-level meter.

a

, A
the first in a series, esp the highest grade or mark, as in an examination
References in periodicals archive ?
When this is followed by an accented vowel the combination always counts as two syllables, as in pa|ura, le|one, or po|eta; as a result the diaeresis is not marked in modern critical editions, because it is not a diaeresis in the stricter sense defined above.
This list of forms with synaeresis does not include a number that fall at the end of the line, where a diaeresis would never be marked; the convention is that any unaccented vowel following an accented vowel in the tenth position of the hendecasyllable counts as a notional eleventh syllable.
22) In addition to the diaereses in this category marked by Petrocchi, I have suggested above (example 100) a further case where a diaeresis should be inserted on io.