diameter

As nouns the difference between ratio and diameter

is that ratio is reason while diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

As a noun diameter

is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

As an initialism dia is

(us|military).

As nouns the difference between diameter and diana

is that diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle while diana is .

As nouns the difference between aperture and diameter

is that aperture is an opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall while diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

As nouns the difference between diameter and opposite

is that diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle while opposite is something opposite or contrary to another.

As an adjective opposite is

located directly across from something else, or from each other.

As an adverb opposite is

in an opposite position.

As a preposition opposite is

facing, or across from.

As a noun diameter

is any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

As an adjective geographical is

of or relating to geography; geographic.

As nouns the difference between diameter and null

is that diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle while null is zero, nil; the cardinal number before einn.

As nouns the difference between diameter and dial

is that diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle while dial is a graduated, circular scale over which a needle moves to show a measurement (such as speed).

As a verb dial is

to measure or indicate something with a dial.

As nouns the difference between diameter and fail

is that diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle while fail is .

As nouns the difference between diameter and ovality

is that diameter is (geometry) any straight line between two points on the circumference of a circle that passes through the centre/center of the circle while ovality is (engineering) a measurement of deviation from circularity of an oval or approximately elliptical shape.