The hollow curvature of the lower parts of upper square-sails, to clear the stays when the yards are braced up.
·vt To cause to arch. II. Roach ·noun The redfin, or shiner. III. Roach ·noun A <<Cockroach>>. IV...
Webster's Dictionary of the English Language
·adj Having a back like that of roach; — said of a horse whose back a convex instead of a concave c...