The word "cunt" forms part of some technical terms used in seafaring and other industries.

• In nautical usage, a cunt splice is a type of rope splice used to join two lines in the rigging of ships. Its name has been bowdlerisedsince at least 1861, and in more recent times it is commonly referred to as a "cut splice".
• The Dictionary of Sea Terms, found within Dana's 1841 maritime compendium The Seaman's Friend, defines the word cuntline as "the space between the bilges of two casks, stowed side by side. Where one cask is set upon the cuntline between two others, they are stowed bilge and cuntline." The "bilge" of a barrel or cask is the widest point, so when stored together the two casks would produce a curved V-shaped gap. The glossary of The Ashley Book of Knots by Clifford W. Ashley, first published in 1944, defines cuntlines as "the surface seams between the strands of a rope." Though referring to a different object than Dana's definition, it similarly describes the crease formed by two abutting cylinders.
• In US military usage personnel refer privately to a common uniform item, a flat, soft cover (hat) with a fold along the top resembling an invagination, as a cunt cap. The proper name for the item is garrison cap or overseas cap, depending on the organization in which it is worn.
• Cunt hair (sometimes as red cunt hair) has been used since the late 1950s to signify a very small distance.
• Cunt-eyed has been used to refer to a person suffering from a squint.