keelson

 
Pronunciation: /ˈkiːls(ə)n/
(also kelson)

noun

  • a structure running the length of a ship and fastening the timbers or plates of the floor to its keel.

Origin:

Middle English kelswayn, related to Low German kielswīn, from kiel 'keel of a ship' + swīn 'swine' (used as the name of a timber)