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
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