The result is a sharp discontinuity in the evolutionary track of the star on the HR diagram.

This is in contrast to an evolutionary track, which is a plot of stars having the same mass but differing ages.

That is, the evolutionary tracks change with changes in the abundance of heavy elements.

Each star follows an evolutionary track across this diagram.

That might mean the Menace was farther along the evolutionary track than humans or Omians.

Those red eyes were a clue: perhaps these races had been cousins somewhere far back on the evolutionary track, Joseph thought.

While both are integral in the interaction of the game, their evolutionary track has not been equal.

On the other hand, if life had wandered off the particular evolutionary track that led to us, it might well have blundered into something similar instead.

But these Shanial represented a separate evolutionary track.

The path the star now follows across the HR diagram, to the upper right of the main sequence, is called an evolutionary track.