peridotic

per·i·dot

[per-i-doh, -dot]
noun Mineralogy.
a green transparent variety of olivine, used as a gem.

Origin:
1300–50; < French péridot; replacing Middle English peritot < Middle French

per·i·dot·ic [per-i-dot-ik, -doh-tik] , adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
peridot (ˈpɛrɪˌdɒt) [Click for IPA pronunciation guide]
 
n
a pale green transparent variety of the olivine chrysolite, used as a gemstone
 
[C14: from Old French peritot, of unknown origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Peridotic is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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