Chemical element and Se

Chemical element noun - Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter.

Se and chemical element are semantically related. In some cases you can replace term "Se" with "Chemical element", this terms are similar.

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).

Chemical element and Se are semantically related. You can use "Chemical element" instead a noun "Se".