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Nabla may refer to one 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 moth
- Nabla (instrument), the Greek word for a Phoenician or Hebrew stringed instrument after the triangular shape of which all of the above are named
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