stereoscopic picture vs photo

stereoscopic picture and photo both are nouns.

Word	Noun	Adjective	Verb	Adverb
stereoscopic picture	Yes	No	No	No
photo	Yes	No	No	No

As nouns, photo is a hypernym of stereoscopic picture; that is, photo is a word with a broader meaning than stereoscopic picture:

stereoscopic picture: two photographs taken from slightly different angles that appear three-dimensional when viewed together
photo: a representation of a person or scene in the form of a print or transparent slide or in digital format

Other hypernyms of stereoscopic picture include exposure, photograph, pic, picture.

stereoscopic picture (noun)	photo (noun)
two photographs taken from slightly different angles that appear three-dimensional when viewed together	a representation of a person or scene in the form of a print or transparent slide or in digital format