selenium cell vs magic eye

selenium cell and magic eye both are nouns.

Word	Noun	Adjective	Verb	Adverb
selenium cell	Yes	No	No	No
magic eye	Yes	No	No	No

As nouns, magic eye is a hypernym of selenium cell; that is, magic eye is a word with a broader meaning than selenium cell:

selenium cell: a photoelectric cell that uses a strip of selenium
magic eye: a transducer used to detect and measure light and other radiations

Other hypernyms of selenium cell include electric eye, photocell, photoconductive cell, photoelectric cell.

selenium cell (noun)	magic eye (noun)
a photoelectric cell that uses a strip of selenium	a transducer used to detect and measure light and other radiations