= Nabla symbol
{title2=$\nabla$}
{wiki}
= Nabla
{synonym}
As if <Greek letters> weren't enough, <physicists> and <mathematicians> also like to make up tons of symbols, <mathematical symbol that looks like a Greek letter but isn't>[some of which look like the could actually be Greek letters]!
Nabla is one of those: it was completely made up in modern times, and just happens to look like an inverted upper case <delta (letter)> to make things even more confusing!
Nabla means "harp" in Greek, which looks like the symbol.