Acid (Lat. acidus, from acere, to be sour). A substance usually sour, sharp, or biting to the taste.
Acromion (Gr. ἀκρον the tip, and ᾧμος, the shoulder). The part of the scapula forming the tip of the shoulder.
Adam’s Apple. An angular projection of cartilage in the front of the neck. It may be particularly prominent in men.
Adductor (Lat. adduco, to draw to). A muscle which draws towards the middle line of the body, or of the hand or foot.
Adenoid (Gr. ἀδήν, a gland). Tissue resembling gland tissue.
Afferent (Lat. ad, to, and fero, to convey). Vessels or nerves carrying the contents or impulses from the periphery to the center.
Albumen, or Albumin (Lat. albus, white). An animal substance resembling the white of an egg.
Albuminuria. A combination of the words “albumin” and “urine.” Presence of albumen in the urine.
Aliment (Lat. alo, to nourish). That which affords nourishment; food.
Alimentary (Lat. alimentum, food). Pertaining to aliment, or food.