The part of any equipment which requires advanced knowledge of physics to design; especially the core nuclear components of a nuclear weapon

Full of action; dramatic and exciting.

plural of Packer whacker

The ordered arrangement of objects such as to create the greatest density (e.g. of atoms in a crystal).

plural of packing plant

A manufacturing warehouse where products are prepared for shipping and handling.

(obsolete) A lively dance, the galliard, whose steps were regulated by the number five.

(archaic) A strong thread or twine used in tying up parcels.

A (horse from the) once-renowned, now-extinct Rhode Island breed of sure-footed, dependable horses.

plural of Pacific Northwesterner