Posted on 22nd September 20178th January 2017 by melyn Trihorn is the Cornish word for triangle Yes, triangle in Cornish is trihorn Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Post navigationPrevious post: Hager-gowas is the Cornish word for delugeNext post: Delk is the Cornish word for necklace