See Also: zone melting(encyclopedia)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
melting(dictionary)
melting(2)(dictionary)
DNA melting(medicine)
melting pot(dictionary)
melting(1)(dictionary)
melting(medicine)
Melting Pot(tourism)
melting point(encyclopedia)

dyscoria (medicine) and zone melting (sh)


dyscoria (medicine)


dyscoria
Abnormality in the shape of the pupil.

Origin: dys-+ G. Kore, pupil of eye


zone melting (sh)




Any of a group of techniques used to purify an element or a compound or to control its composition by melting a short region (called a zone) and causing this liquid zone to Travel slowly through a relatively long ingot, or charge, of the solid.

In zone refining, the most important of the zone-melting techniques, a solid is refined by multiple molten zones being passed through it in one direction. Each zone carries a fraction of the impurities to the end of the solid charge, thereby purifying the remainder. Zone refining is particularly important as a method of purifying crystals, especially for use in semiconductor devices.