Of or relating to Boris Yeltsin (Russian: Бори́с Е́льцин; 1931–2007), Russian politician and the first President of the Russian Federation, serving from 1991 to 1999.

(geology) A mineral that did not develop its otherwise typical external crystal form because of late crystallization between earlier formed crystals, typical of matrix minerals in rapidly crystalli...

plural of locating engineer

Misspelling of glutarimide.