Wiktionary
mirrorless
a. 1 Without a mirror#Noun. 2 (context rare English) Not mirrored; unreflective. n. (context photography English) A mirrorless interchangeable-lens camera, similar to a digital SLR, but usually made smaller by incorporating an electronic viewfinder instead of a mirror and prism.
Usage examples of "mirrorless".
His television stands on the mirrorless dressing table, its newness in stark contrast to the tawdriness of everything else.
A spitting contest followed, at a heated moment of which the losing side dropped a valuable, mirrorless powder compact out of her cardigan pocket.