Hall process

noun

a process in which aluminum is refined by electrolytic reduction of alumina fused with cryolite.

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Origin:
after Charles Martin Hall

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hall process is always a great word to know.

So is bezoar. Does it mean:

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

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