Meaning of triatic stay

tri•at'ic stay'

Pronunciation: (trī-at'ik), [key]
— Naut. Naut.
  1. a backstay for the head of a fore-and-aft-rigged topmast, running down to the head of the lower mast next aft.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.