Definition of endmember in English:

endmember

noun

Geology
  • A mineral or rock representing one end of a series having a range of composition.

    • ‘The A-type granites cluster towards the mantle endmember.’
    • ‘The isotopic composition of these recrystallized bones is therefore a mixture between two endmember compositions, one biogenic and one diagenetic.’

Pronunciation:

endmember

/ˈɛndmɛmbə/