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Abbreviation	Definition
A	absorbance
a	absorptivity
A	accessory
A	acetum
A	actin
A	Actinomyces
A	adenosine
A	admittance Electricity
A	adrenaline
A	adriamycin
A	Adults & Communities
A	akinetic
A	alanine
A	alcohol
A	alert and responsive
A	allele
A	allergist
A	allergy
A	alternating current
A	alveolar gas