Nabla

Nabla may refer to any of the following:the nabla symbol ∇ the vector differential operator, also called del, denoted by the nabla Nabla, tradename of a type of rail fastening system Nabla (moth), a genus of moths Nabla (instrument), the Greek word for a Phoenician stringed instrument after the triangular shape of which all of the above are named, reported as "nebel/nevel" in Hebrew sources. Ranjan Daimary or D. R. Nabla, an Indian militant