A 26-dimensional (or 10-dimensional) string that has a line-like topology in which all fundamental forces are unified. It is possible that our 3-dimensional Universe collapsed out of such a string. Strings have not yet been observed.

Another name for a "Supersymmetric String", which is usually referred to simply as a String.

A superstring, also known as a cracker wall, is a name commonly given to an immense bundle of firecrackers, usually numbering in the hundreds of thousands, which are often a central fixture at fireworks conventions. Although large compound strings of firecrackers have been constructed since firecrackers were invented, the superstring was greatly popularized by the Pyrotechnics Guild International, whose yearly convention often features a huge superstring consisting of well over a million firecrackers. Superstrings are usually constructed over a rudimentary wooden or metallic structure as a sort of curtain wall.

a hypothetical particle that is the elementary particle in a theory of space-time

an elementary particle at the base of matter and energy