Nabla may refer to any of the following:
* the

nabla symbol
∇
The nabla symbol
The nabla is a triangular symbol resembling an inverted Greek delta:Indeed, it is called ''anadelta'' ( ανάδελτα) in Modern Greek
Modern Greek (, , or , ''Kiní Neoellinikí Glóssa''), generally referred to by ...

∇
** the vector differential operator, also called del
Del, or nabla, is an operator used in mathematics (particularly in vector calculus
Vector calculus, or vector analysis, is concerned with derivative, differentiation and integral, integration of vector fields, primarily in 3-dimensional ...

, denoted by the nabla
* Nabla, tradename of a type of rail fastening systemA rail fastening system is a means of fixing rails to railroad ties (North America
North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be described as the northern ...

(of roughly triangular shape)
* ''Nabla'' (moth), a genus of moths
* Nabla (instrument), the Greek word for a Phoenician or Hebrew stringed instrument after the triangular shape of which all of the above are named
{{disambiguation