The WIMP, or weakly interacting massive particle, is a candidate for what may comprise the dark matter. WIMPs interact with other forms of matter through gravity and the weak nuclear force, but not through the electromagnetic force or the strong nuclear force. The lack of electromagnetic interactions means that WIMPs are nonluminous and therefore dark. They are assumed to be much heavier than the known Standard Model particles, with a mass greater than a few GeV. WIMP is a general term that can be applied to any particle fitting the above criteria. The neutralino, the supersymmetric partner of the neutrino, is an example of a WIMP candidate.