montmorillonitic

mont·mo·ril·lon·ite

[mont-muh-ril-uh-nahyt]
noun
any of a group of clay minerals characterized by the ability to expand when they absorb large quantities of water.
Also called smectite.


Origin:
1850–55; named after Montmorillon, France, where it was found; see -ite1

mont·mo·ril·lon·it·ic [mont-muh-ril-uh-nit-ik] , adjective
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World English Dictionary
montmorillonite (ˌmɒntməˈrɪləˌnaɪt) [Click for IPA pronunciation guide]
 
n
a clay mineral consisting of hydrated aluminium silicate: an important component of bentonite
 
[C19: named after Montmorillon, French town where it was first found, + -ite1]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Montmorillonitic is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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