Definition of midpiece in US English:

midpiece

noun

  • 1Chiefly Biology. A middle section or part of a structure, organism, etc.

  • 2Cell Biology. A region of the spermatozoon located behind the neck and ensheathed in closely-packed mitochondria.

  • 3Immunology. A component of complement identified in the euglobulin fraction (consisting chiefly of the first component, C1). Now historical.

Origin

Late 19th century; earliest use found in American Naturalist. From mid + piece.

Pronunciation

midpiece

/ˈmɪdpiːs/