13-Letter Words Containing: R,C,R,Y

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)

• the process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalyst

• red pigment in red algae

• of or relating to cryptanalysis

• brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems