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malachite

malachite  

Mineral, Cu2CO3(OH)2; sp. gr. 3.9–4.0; hardness 3.5–4.0; monoclinic; bright green; pale green streak; in fibrous condition with a silky lustre, crystals with adamantine or vitreous lustre; crystals ...
computer

computer  

Any device capable of carrying out a sequence of operations in a defined manner. The definition of the operations is called the program. An analog computer performs computations by manipulating ...

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