enlarger
US /ɪnˈlɑːr.dʒɚ/
UK /ɪnˈlɑːr.dʒɚ/
1.
a device used in photography to produce prints from negatives or transparencies, typically allowing for adjustment of size and focus
:
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He developed his black and white photos using an old darkroom enlarger.
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The photography class learned how to use an enlarger to create different print sizes.