di·a·pos·i·tive

[dahy-uh-poz-i-tiv]
noun
a positive photographic image produced on a transparent film or glass base.

Origin:
1890–95; dia- + positive

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
diapositive (ˌdaɪəˈpɒzɪtɪv) [Click for IPA pronunciation guide]
 
n
a positive transparency; slide

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Diapositive is always a great word to know.
So is ninnyhammer. Does it mean:
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.
a fool or simpleton; ninny.
Example sentences
The diapositive is inspected to insure clarity and radiometric uniformity.
The diapositive is inspected to ensure clarity and radiometric uniformity.
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