'Advance' is thus a useful term for long-term improvement in some general property of life.
Thus "double star" remains a useful term for pairs whose status is not fully known.
A limited vocabulary of immediately useful terms should be used in all drills and conversations.
Some question that "global temperature" is even a meaningful or useful term.
In more useful terms, this means that any P problem can be solved in less than c*nk steps.
Moreover, such variations are pretty interesting, and I see no need to retire useful terms that describe them.
Another useful term is caesura, for a natural pause within a line.
American billions are the accepted standard these days, and jolly useful the term is too.
Here's a guide to some of the more useful new terms.
I put it with martyrdom-in the category of terms useful to know.