船舷上缘

Gunnel \Gun"nel\, n. [See {Gunwale}.]
1. A gunwale.

2. (Zo["o]l.) A small, eel-shaped, marine fish of the genus
{Mur[ae]noides}; esp., {M. gunnellus} of Europe and
America; -- called also {gunnel fish}, {butterfish}, {rock
eel}.

Gunwale \Gun"wale\, n. [Gun + wale. So named because the upper
guns were pointed from it.] (Naut.)
The upper edge of a vessel's or boat's side; the uppermost
wale of a ship (not including the bulwarks); or that piece of
timber which reaches on either side from the quarter-deck to
the forecastle, being the uppermost bend, which finishes the
upper works of the hull. [Written also {gunnel}.]