point group

American  

noun

Crystallography.

1. a class of crystals determined by a combination of their symmetry elements, all crystals left unchanged by a given set of symmetry elements being placed in the same class.

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point group British  

noun

1. crystallog another term for crystal class

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Etymology

Origin of point group

First recorded in 1900–05

Example Sentences

Mr Loeb's Third Point group is the second-biggest investor with a 14% stake.

From BBC

When Jeh Johnson, the general counsel at the Pentagon in the Obama administration, compiled a memo to justify the raid on Osama bin Laden’s compound in Abbottabad in 2011, he is reported to have drawn on the work of the West Point group in arguing controversially that Pakistan was “unwilling or unable” to deal with Bin Laden itself.

From The Guardian

“We’re at the top; now it’s just a matter of pushing it out and finishing,” said Steve Marshall with The Fine Point Group, which handles marketing for the project.

From Washington Times

"The DEC proposal would mean lost jobs, higher electricity prices, significantly lower electric reliability and vast economic uncertainty," New York Affordable Reliable Electricity Alliance, the pro Indian Point group, said in a statement.

From Reuters

“Virtually all Islamic extremist groups make use of social media to advance their causes, but the ISIL’s media production team is especially adept, and its target audience extends beyond the Arabic-speaking world,” the West Point group said.

From Washington Times