mainstay

You know the species because androids have been a mainstay of science fiction since before Isaac Asimov coined the “three laws of robotics” for a novelette published in 1942.

With nearly a quarter of the season already gone, it looks like two mainstays of the league in recent campaigns will be scrapping to avoid finishing 12th.

In that short time, her salary has become the mainstay of her household.

Together, the Campbells were mainstays of the Edinburgh political scene.

But how did E. coli come to be such a mainstay of biotechnology, why is it so useful and what might its future hold?