This always bugged me, but it makes sense if "be balanced" is the basic idea of ngaD, and the word is also a short way to express "be stable."
I think of it the other way. My understanding would make "stable" the fundamental meaning, with "balanced" to clarify that it's not talking about something like a lack of tendency to decay. It's like a "stable structure", not a "stable isotope" or "shelf-stable milk".
I appreciate your thoughtful reply. Your interpretation makes more sense than mine, particularly since the glosses are given in that order.
I'm still interested in using Klingon to discuss physical science, and so finding precise ways to use Klingon vocabulary, but not at the expense of flouting colloquial usage.
~mIp'av