endcap

end +‎ cap

endcap (plural endcaps)

1. A cap placed on the end of something
2. A product display at the end of a supermarket aisle
   • 2009 July 22, Motoko Rich, “Target Can Make Sleepy Titles Into Best Sellers”, in New York Times‎:

     Another endcap featured Breakout books under a sign that read “Hand-Picked Titles From Emerging Authors” and showed a picture of a small chick pecking its way out of a broken eggshell.

endcap (third-person singular simple present endcaps, present participle endcapping, simple past and past participle endcapped)

1. To add an endcap
2. (organic chemistry) To modify a reactive end of a polymer, typically by adding a trimethylsilyl group to a hydroxyl