se

(noun) 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). Synonyms: selenium, Se, atomic number 34.

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