Meaning of through-hull in English:

through-hull

Pronunciation /ˈθruːhʌl/

adjective

(also thru-hull)
  • Designating a fitting in a boat or ship which passes through the hull and is designed to admit pipes, hoses, etc.; (often) specifically designating the fitting for a sea-cock.

noun

(also thru-hull)
  • A through-hull fitting.

Origin

Early 20th century; earliest use found in Motorboat. From through + hull.