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1. A toxic nonmetallic element related to sulphur 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 sulphide ores (as pyrite)
   - selenium, atomic number 34

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

Type of: antioxidant, chemical element, compass point, element, point

Part of: fool's gold, iron pyrite, pyrite

Encyclopedia: SE