The terminal part of the tail of a spermatozoon, consisting of the axoneme and the flagellar membrane.
When Does Summer Really End?So when the rest and relaxation is shooed away for cooler days and the start of school, it’s easy to forget that the summer season is far from over.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for end piece
Saw the sides of the box in half, crosswise, and remove the upper half and the end-piece.The Boy Craftsman|A. Neely Hall