epochmaking

ep·och-mak·ing

[ep-uhk-mey-king or, esp. British, ee-pok-]
adjective
opening a new era, as in human history, thought, or knowledge; epochal: an epoch-making discovery.

Origin:
1870–75

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
epoch-making
 
adj
of great importance; momentous

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Epochmaking is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
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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