1. The native form of a metal, whether free and uncombined, as gold, copper, etc, or combined, as iron, lead, etc. Usually the ores contain the metals combined with oxygen, sulphur, arsenic, etc. (called mineralizers).
2. (Science: chemical) A native metal or its compound with the rock in which it occurs, after it has been picked over to throw out what is worthless.
3. Metal; as, the liquid ore. Ore hearth, a low furnace in which rich lead ore is reduced; also called Scotch hearth.
Origin: AS. Ra; cf. Ar brass, bronze, akin to OHG. R, G. Ehern brazen, Icel. Eir brass, Goth. Ais, L. Aes, Skr. Ayas iron. 210. Cf. Ora, Era.

You will also like...

An artist's depiction of the origin of amphibians
Amphibians & Early Reptiles

Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

Hormone Production
Hormone Production

Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

Animal Water Regulation

Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

green leaf - close up view

Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..

Types and Causes of Brain Damage
Types and Causes of Brain Damage

This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

Energy pyramid
Freshwater Community Energy Relationships – Producers & Consumers

This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..