Illitic

il·lite

[il-ahyt]
noun
any of a group of clay minerals, hydrous potassium aluminosilicates, characterized by a three-layer micalike structure and a gray, light green, or yellowish-brown color.

Origin:
1937; ill(inois) + -ite1

il·lit·ic [ih-lit-ik] , adjective
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illite (ˈɪlaɪt) [Click for IPA pronunciation guide]
 
n
a clay mineral of the mica group, found in shales and mudstones. Crystal structure: monoclinic. Formula: K1--1.5Al4(Si6.5--7Al1--1.5O20)(OH)4
 
[C20: named after Illinois, where it was first found]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Illitic is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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