a

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a

, A
the first in a series, esp the highest grade or mark, as in an examination
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

a

(electricity)
(physics)

A

(electricity)
(mechanics)

Å

(mechanics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The results of chemosystematics analysis: the ubiquitous production of flavonols in detriment of other flavonoid type metabolites resulted in a very low flavone/ flavonol ratio; the high degree of unprotected flavonoid hydroxyls (31%) and preferential hydroxyl protection by glycosylation mechanism (49%) in contrast to methylation (11%) and double protection (9%) mechanism; besides the low level of A-ring transformation, confirm the primitive positioning of the superorder Rosiflorae according to the botanists.
From inside the A-ring, I saw the highest one fluttering in the breeze above the Pentagon's roof on that beautiful fall day.
The diversion aims to enable expansion and upgrading works on Al-Diwan Intersection and the installation of new traffic lights as part of the A-Ring Road Development Project, which will contribute to enhancing traffic movement and reducing congestion in the areas surrounding A-Ring Road, Ashghal has said.
The a-ring lactone of brevetoxin PbTx-3 is required for sodium channel orphan receptor binding and activity.
Temporarily designated 1981 S13, the tiny moon apparently creates the 320-kilometer-wide "Encke's gap" in the planet's A-ring, the outermost of its clearly visible rings.
Ashghal wiil also divert traffic on part of the A-Ring Road in both directions from after Ras Bu Abboud Bridge up to Dar Al-Kutub Roundabout into a parallel diversion road with the same number of lanes.
The Public Works Authority (Ashghal) has announced that it will convert Al-Rifaa Intersection (Sanaa signal) into a temporary roundabout, in addition to diverting traffic on part of A-Ring Road in both directions, from after Ras Bu Abboud Bridge up to Dar Al-Kutub Roundabout, onto a parallel diversion road with the same number of lanes.