# Prevent line break at one specific spot

I have

\myDefineTerm{longFunctionName}($\pi$)....


and want to tell LaTeX not to break the line just before the open bracket. Is there something like ~ that pretent a line break, but does not cause a horizontal space?

Note: \mbox is not helpful, since I want to allow hyphenation of longFunctionName.

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@administrators: actually a pretty stupid question. Feel free to delete it. –  DaveBall aka user750378 Sep 8 at 20:23
\myDefineTerm{longFunctionName}\nolinebreak($\pi$)