semicircumference

As nouns the difference between circle and semicircumference

is that circle is (lb) a two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from another point while semicircumference is one half of the circumference of a circle.

As a verb circle

is to travel around along a curved path.

As nouns the difference between circumference and semicircumference

is that circumference is (geometry) the line that bounds a circle or other two-dimensional figure while semicircumference is one half of the circumference of a circle.

As a verb circumference

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

As nouns the difference between half and semicircumference

is that half is one of two usually roughly equal parts into which anything may be divided, or considered as divided; — sometimes followed by of; as, a half of an apple while semicircumference is one half of the circumference of a circle.

As an adjective half

is consisting of a moiety, or half (1/2, 50%).

As an adverb half

is in two equal parts or to an equal degree; in some part approximating a half; partially; imperfectly.

As a verb half

is to halve.

As a preposition half

is a half-hour after, thirty minutes after used with the number of the hour.