end member

American  

noun

Mineralogy.

1. either of two pure compounds occurring in various proportions in a series of solid solutions that comprises a mineral group.

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Example Sentences

To that end, member of the right-wing House Freedom Caucus leaked to the Washington Post this week drafted articles of impeachment against Deputy Attorney General Rod Rosenstein, who’s overseeing Special Counsel Robert Mueller’s investigation.

From MSNBC

Ms. in ‘t Veld acknowledged that, in the end, member state governments could choose not to take further action, “but they will have to explain it to their citizens,” she said.

From New York Times

Later, with the dropping of the first atomic bomb on Japan, nuclear again came to be associated with the ultimate end member of this dark side to technology.

From Forbes

This one represents a polar end member, enabling the study of ecology at extreme environmental limits.

From New York Times

In the end, member states were allowed to opt out of an EU prohibition provided certain requirements were met, but the issue has continued to be controversial, and the court in Luxembourg is due to deliver its verdict on a test case by the Belgian consumer body, Test-Achats.

From The Guardian