circumferentially

As adverbs the difference between annularly and circumferentially

is that annularly is in an annular manner while circumferentially is in a way that encircles; around the circumference.

As a noun circumference

is (geometry) the line that bounds a circle or other two-dimensional figure.

As a verb circumference

is (obsolete|transitive) to include in a circular space; to bound.

As an adverb circumferentially is

in a way that encircles; around the circumference.

As a verb encircle

is to surround, form a circle around.

As an adverb circumferentially is

in a way that encircles; around the circumference.