A

• abnormal;

• abortion;

• absolute temperature;

• absorbance;

• acceptor;

• accommodation;

• acetone;

• acetum;

• achondroplasia;

• acid;

• acidophil, acidophilic;

• acromion;

• actin;

• Actinomyces;

• activity [radiation];

• adenine;

• adenoma;

• adenosine;

• admittance;

• adrenalin;

• Adriamycin;

• adult;

• age;

• akinetic;

• alanine;

• albino [guinea pig];

• albumin;

• allergologist, allergy;

• alpha [cell];

• alveolar gas;

• ambulation;

• ampere;

• amphetamine;

• ampicillin;

• amplitude;

• anaphylaxis;

• androsterone;

• anesthetic;

• angstrom, Angstrom unit;

• anode;

• Anopheles;

• antagonism;

• anterior;

• antibody;

• antrectomy;

• apical;

• aqueous;

• area;

• argon;

• artery [Lat. arteria];

• atomic weight;

• atrium;

• atropine;

• auricle;

• auscultation;

• axial;

• axilla, axillary;

• before [Lat. ante];

• blood group A;

• ear [Lat. auris];

• mass number;

• subspinale;

• total acidity;

• tumor limited to the bowel [Dukes classification];

• tumor limited to the mucosa [Astler-Coller classification];

• water [Lat. aqua];

• year [Lat. annum]

• [band] the dark-staining zone of a striated muscle