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synchroflash

American  
[sing-kruh-flash] / ˈsɪŋ krəˌflæʃ /

adjective

  1. of or relating to photography employing a device that synchronizes the photoflash with the shutter.


synchroflash British  
/ ˈsɪŋkrəʊˌflæʃ /

noun

  1. a mechanism in a camera that enables the shutter to be fully open while the light from a flashbulb or electronic flash is at its brightest

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of synchroflash

First recorded in 1935–40; synchro- + flash