15-Letter Words Containing: A,E,O,R,R,S,T

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

• a stabilizer consisting of a heavy gyroscope that spins on a vertical axis; reduces side-to-side rolling of a ship or plane

• the branch of medicine dealing with mental disorders attributable to diseases of the nervous system

• congenital condition in which external genitalia and internal sex organs have both male and female characteristics

• showing characteristics of both sexes