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)
同义词：seleniumatomic number 34
the compass point midway between south and east; at 135 degrees
同义词：southeastsou'-eastsoutheastward
英汉双解大词典
SE
1.
（） SE is a written abbreviation for . southeast的缩写形式