SE SE /ˈseɪ/

noun

1. The compass point midway between south and east; at 135 degrees  ( SE , sou'-east , southeastward , southeast )
   the compass point midway between south and east; at 135 degrees
   
   

 Se

1. A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)  ( atomic number 34 , Se , selenium )
   a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)