A kind of motorboat stern, for use in shallow waters, in which the propeller is housed in a tunnel and does not extend below the greatest draft.

plural of square stern

Men generally.

(nautical) A diving plane mounted on or near the stern of a submarine.

plural of stern plane

The three-tangle pretzel knot with two right-handed twists in its first tangle, three left-handed ones in its second, and seven left-handed ones in its third.

(nautical) Over the full length of a ship or boat, from the front end of the vessel to the back end. / (idiomatic, by extension) From front to back; from one end to the other end.