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Definition of sub-member in English:

sub-member

Pronunciation /ˈsʌbˌmɛmbə/

noun

  • 1A subordinate or secondary member of a group, category, etc.

  • 2Architecture Engineering
    A secondary or subordinate part of an arch or other structure.

Origin

Early 19th century; earliest use found in John Wilkes (1725–1797), politician. From sub- + member.