Joshua Bloch, of Effective Java fame, used the term unintentional object retention as a more precise term for memory “leaks” in garbage collected languages.
I’ve also heard this referred to as Abandoned Memory, or sometimes a Space Leak. It’s a common class of bug in a reference counted language, like Objective-C, where cycles need special consideration.
Interesting, not really heard those terms, always "live leak". It's quite possible to introduce a live leak with manual memory management as well, though perhaps less seldom.
Seemes a bit pedantic, but so am I. I like that term.