Se
n 1: a toxic nonmetallic element related to sulfur and tellurium;
occurs in several allotropic forms; a stable gray
metallike allotrope conducts electricity better in the
light than in the dark and is used in photocells; occurs
in sulfide ores (as pyrite) [syn: {selenium}, {Se}, {atomic
number 34}]
2: the compass point midway between south and east; at 135
degrees [syn: {southeast}, {sou'-east}, {SE}]