magic eye
- n a transducer used to detect and measure light and other radiations
magic marker
- n a pen with a writing tip made of felt (trade name Magic Marker)
magic mushroom
- n the button-shaped top of the mescal cactus; a source of psilocybin
magic number
- n the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126