Tib., dril bu
Foremost, the term refers to the bell in Tantric ritual that is symbolic of the feminine
energies; contrasting with the male vajra/dorje. Images of Buddhas and
other Vajrayana dignitaries often show them with one or both of these
attributes in their hands.
Very often, the drilbu has a handle in the form of half a dorje and should therefore, technically speaking, be referred to as Dorje-Drilbu of Vajra-Ghanta. This is usually not the case but there are forms of the bell without such a handle, featuring a moon- or hornlike handle.
Often, the term ghanta is used as a secret code for the yoni.