tail covert (of a bird)
Ornithological term for the feathers covering the base of a bird's tail.
This bird's tail coverts are a vivid blue.
tail pipe (of a turbine)
Engineering term for the exhaust duct of a turbine.
High-temperature gas is discharged from the turbine's tail pipe.
Firearms term for the part of a rifle that houses the operating parts.
The manufacturing year can be determined from the markings on the receiver.