Definition of photostereogram in English:
 photostereogram
noun ˌfəʊtəʊˈstɛrɪə(ʊ)ɡram
rare A stereoscopic photograph; = "stereophotograph".
Origin
  
Early 20th century; earliest use found in Chemical Abstracts. From photo- + stereogram.
   Definition of photostereogram in US English:
 photostereogram
nounˌfəʊtəʊˈstɛrɪə(ʊ)ɡram
rare A stereoscopic photograph; = "stereophotograph".
Origin
  
Early 20th century; earliest use found in Chemical Abstracts. From photo- + stereogram.