seatstay
English
Etymology
(Possibly) borrowed from sailing jargon where "stay" refers to a rope, wire, or rod which runs fore-and-aft along the centerline of a sailing ship from mast to deck, or to another mast, and serves to stabilize the mast.
Noun
seatstay (plural seatstays)
- One of the two bicycle frame tubes running diagonally downward from the top of the seat tube to the rear dropouts.
- The bike was not safe to ride as it had a bend in the seatstay