Roundhouse kick

A roundhouse kick (also known as turning kick or a power angle kick but often confused with the round kick) is a kick in which the attacker swings his or her leg around in a semicircular motion, striking with the front of the leg or foot. This type of kick is utilized in many different martial arts and is popular in both non-contact and full-contact martial arts competitions. The kick has many variations based on stance, leg movement, striking surface, and the height of the kick.

Semi-circular kick
A semi-circular kick is a round kick to forty five degree roundhouse kick (or "diagonal kick"). Most popular in kick-boxing, burmese boxing and Muay thai, it can be used in almost every situation. With this kick, all parts of the opponent’s body can be attacked and every kind of attack can be countered. In karate it is called:Mawashi geri