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 ( ανάδελτα) in Modern Greek. \nabla or ∇. The name comes, by reason of the symbol's shape, from the Hellenistic Greek word f ...
∇
** the vector differential operator, also called
del
Del, or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented by the nabla symbol ∇. When applied to a function defined on a one-dimensional domain, it denotes th ...
, denoted by the nabla
* Nabla, tradename of a type of
rail fastening system
A rail fastening system is a means of fixing rails to railroad ties (North America) or sleepers (British Isles, Australasia, and Africa). The terms ''rail anchors'', ''tie plates'', ''chairs'' and ''track fasteners'' are used to refer to parts ...
(of roughly triangular shape)
*
''Nabla'' (moth), a genus of moths
*
Nabla (instrument)
The nevel or nebel ( he, נֵבֶל ''nēḇel'') was a stringed instrument used by the Israelites. The Greeks translated the name as ''nabla'' (νάβλα, "Phoenician harp").
A number of possibilities have been proposed for what kind of inst ...
, the Greek word for a Phoenician or Hebrew stringed instrument after the triangular shape of which all of the above are named
{{disambiguation