lim·bers 
(lĭmbərz)
(lĭmbərz)pl.n.
Gutters or channels on each side of a ship's keelson that drain bilge water into the pump well.
[Probably alteration of French lumière, one of the limbers, from Old French lumiere, opening, light, from Late Latin lūmināria, pl. of lūmināre, window, from Latin, lamp; see LUMINARY.]