A position in rugby football in the back line.

(historical) The period of Egyptian history from the end of the Middle Kingdom midway through the 13th dynasty to the start of the New Kingdom at the beginning of the 18th dynasty, characterized by political disintegration and later the conquest of Egypt by the Hyksos.

plural of second five-eighth

(informal) A period of intense conflict between the two Koreas in the 1960s, that included the attempted assassination of the South Korean president and the capture of the U.S.S. Pueblo by North Korea.

plural of foot per second

(cryptography) An attack on a cryptographic hash function that is able to find a second preimage for a hash and its preimage; that is, given a hash and an input that has that specific hash, it is able to find (faster than by brute force) another input with the same hash.

a unit of both speed and velocity, expressing the distance in feet traveled or displaced, divided by the time in seconds

(historical) A period in the United States between the 1940s and 1950s marked by a widespread fear of communism and socialism; McCarthyism.

a nonlinear optical process in which two photons with the same frequency interact with a nonlinear material

plural of second-harmonic generation