28-letter words containing r, i, d, l, e
- united states postal service — an independent federal agency created in 1971 to replace the Post Office Department as the division of the federal government responsible for postal services. Abbreviation: USPS.
- variable-density wind tunnel — a closed-circuit wind tunnel entirely contained in a casing in which the pressure and therefore the density of the working fluid can be maintained at a preselected value
- walden, or life in the woods — a book of philosophical observations (1854) by Thoreau.
- will never do/would never do — If you say that something will never do or would never do, you are saying, often humorously, that you think it is not appropriate or not suitable in some way.
- zeroth law of thermodynamics — the principle that any two systems in thermal equilibrium with a third system are in thermal equilibrium with each other. Compare law of thermodynamics (def 2).