21-letter words containing r, y, e, b
- public address system — loudspeaker
- public-address system — a combination of electronic devices that makes sound audible via loudspeakers to many people, as in an auditorium or out of doors.
- public-key encryption — (cryptography) (PKE, Or "public-key cryptography") An encryption scheme, introduced by Diffie and Hellman in 1976, where each person gets a pair of keys, called the public key and the private key. Each person's public key is published while the private key is kept secret. Messages are encrypted using the intended recipient's public key and can only be decrypted using his private key. This is often used in conjunction with a digital signature. The need for sender and receiver to share secret information (keys) via some secure channel is eliminated: all communications involve only public keys, and no private key is ever transmitted or shared. Public-key encryption can be used for authentication, confidentiality, integrity and non-repudiation. See also knapsack problem.
- pure imaginary number — a complex number of the form iy where y is a real number and i = .
- rayleigh distribution — (mathematics) A curve that yields a good approximation to the actual labour curves on software projects.
- real estate liability — Real estate liability is liability for risks that come from owning real estate.
- rectangular hyperbola — a hyperbola with perpendicular asymptotes
- relative permeability — the ratio of the permeability of a medium to that of free space
- reverberatory furnace — See at reverberatory (def 2).
- rob peter to pay paul — to take something from (someone) by unlawful force or threat of violence; steal from.
- salam-weinberg theory — the electroweak theory.
- supplementary benefit — (formerly) an extra amount of money that is paid to someone by the government, in addition to their normal income. Replaced by income support in 1988
- sympathetic vibration — a vibration induced by resonance.
- take sb/sth seriously — If you take someone or something seriously, you believe that they are important and deserve attention.
- the break of day/dawn — The break of day or the break of dawn is the time when it begins to grow light after the night.
- the yellow brick road — the road to success or happiness (in the film the Wizard of Oz the yellow brick road leads to Oz)
- to be arrayed against — to be opposed to
- to be public property — to be publicly owned
- to have money to burn — If you say that someone has money to burn, you mean that they have more money than they need or that they spend their money on things that you think are unnecessary.
- to lay something bare — If you lay something bare, you uncover it completely so that it can then be seen.
- trustee in bankruptcy — a person appointed by a court to administer the property of a bankrupt.
- weinberg-salam theory — electroweak theory.
- william of malmesbury — William of, William of Malmesbury.
- yellow-rumped warbler — a common North American wood warbler, Dendroica coronata, having yellow spots on the rump, crown, and sides, including a white-throated eastern subspecies (myrtle warbler) and a yellow-throated western subspecies (Audubon's warbler)