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Abbreviation	Definition
A	amphetamine
A	animal
A	anion
A	annealing
A	anoxia/reoxygenation
A	anterior
A	antinuclear antibody (ANA is more commonly used)
A	apical/radial
A	aqueous
A	area
A	arterial
A	arteriolar
A	asbestos
A	asparagine
A	assist
A	atrial
A	atrium
A	atropine
A	augmenting reducing
A	auricular

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