| antioxidant | <chemistry> One of many widely used synthetic or natural substances added to a product to prevent or delay its deterioration by action of oxygen in the air. Rubber, paints, vegetable oils and prepared foods commonly contain antioxidants. (13 Jan 1998) |
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| mega- | <physics, prefix> Metric prefix indicating 1,000,000 times a given quantity. For example, a megawatt is 1,000,000 watts. (29 Oct 1998) |
| mega-oesophagus | <radiology> Achalasia, Chagas disease, idiopathic pseudo-obstruction, amyloidosis, Ehlers-Danlos syndrome, presbyesophagus (uncommon), oesophageal dysmotility (usually mild to moderate dilatation) (12 Dec 1998) |
| tablets | Solid dosage forms, of varying weight, size, and shape, which may be molded or compressed, and which contain a medicinal substance in pure or diluted form. (12 Dec 1998) |
| tablets, enteric-coated | Tablets coated with material that delays release of the medication until after they leave the stomach. (12 Dec 1998) |