Aerodynamically designed refers to objects that have been designed with the purpose of reducing drag and increasing efficiency in air or water. The term can be seen in the crossword solutions 'SLEEK' (5 letters) and 'OLEG' (4 letters). SLEEK is an adjective used to describe something that is smooth, graceful, and stylish, while OLEG is a reference to Oleg Antonov, a Soviet aircraft designer who was renowned for his aerodynamic designs.