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 (of roughly triangular shape)
 * 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