OTL is a stick figure of a person on all fours. O= head, T = arms on the ground, and L = legs. The lowercase form is orz. This emoticon can be used interchangeably with *worship* which simply means that you are grateful to whomever you present the emoticon to.
exists and is an alternate of . Nuclear fusion is a nuclear reaction, not a chemical reaction. In nuclear fusion, the nuclei of atoms combine in order to form new atoms (hence the term nuclear reaction). This type of reaction is mainly concerned with the movement of protons and neutrons.
1 This nuclear reaction was the first of the two to be discovered. All commercial nuclear power plants in operation use this reaction to generate heat which they turn into electricity.  Fusion is the combining of two small atoms such as Hydrogen or Helium to produce heavier atoms and energy.