Coamings \Coam"ings\, n. pl. [Cf. {Comb} a crest.] (Naut.)
Raised pieces of wood of iron around a hatchway, skylight, or
other opening in the deck, to prevent water from running
bellow; esp. the fore-and-aft pieces of a hatchway frame as
distinguished from the transverse head ledges. [Written also
{combings}.]
[1913 Webster]