A machine for the manufacture of screws, typically either by carving a groove into a thick nail, or by welding a thread formed of wire to a thin nail.

A map showing how an area would look in case of flooding, or rising sea levels.

(physics) mass defect

(chemistry) The fractional proportion of a substance in a mixture, by weight/mass.

Used other than figuratively or idiomatically: see mail, it, in. / (idiomatic) To deliver a performance without commitment or effort, with lackluster results.

(military, US) A non-commissioned officer of rank E-9 in the United States Marine Corps, ranking above a master sergeant/first sergeant and below a warrant officer. It is equal in grade to sergeant major

plural of master gunnery sergeant

(slang, figuratively) A person who takes part in long sessions of love making.

Alternative form of lovemaking

(countable, idiomatic, vulgar, slang) A pointless competition, dispute or conflict, often over some trivial matter.