ultralean

As adjectives the difference between ultraclean and ultralean

is that ultraclean is exceptionally clean while ultralean is especially lean; streamlined.

As adjectives the difference between streamlined and ultralean

is that streamlined is designed to offer little resistance to the flow of fluid, especially by having sleek, graceful lines while ultralean is especially lean; streamlined.

As a verb streamlined

is past tense of streamline.

As a proper noun lean

is .

As an adjective ultralean is

especially lean; streamlined.