Film Term:
The actual term for the opposite of a blow up is a Reduction Print, but this term has been coined by Colorlab in Rockville, Maryland, for a reduction print made from super 16mm to regular 16mm, as an alternative to the much more expensive process of blowing up super 16mm to 35mm.
Glossary of Film Terms - http://homepage.newschool.edu/~schlemoj/film_courses/glossary_of_film_terms/
reprinted with permission