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laevorotation

World English Dictionary

laevorotation (ˌliːvəʊrəʊˈteɪʃən)

—n
1.	a rotation to the left
2.	an anticlockwise rotation of the plane of polarization of plane-polarized light as a result of its passage through a crystal, liquid, or solution

Collins English Dictionary - Complete & Unabridged 10th Edition
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Laevorotation 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 gadget; dingus; thingumbob.

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