Calisthenics
Calisthenics is a practice consisting of a variety of gymnastic physical exercises and strength training aiming to improve physical abilities and body composition. Depending on periods and countries, forms and definitions of calisthenics changed.
The word "calisthenics" comes from ancient Greek kalos (κάλος), which means "beauty" (to emphasize the aesthetic pleasure that derives from the perfection of the human body), and sthenos (σθένος), meaning "strength" (great mental strength, courage, strength and determination). It is the art of using one's body weight as resistance in order to develop physique.
In 2010, calisthenics is more or less mistaken with "street workout" (which is one of the possible forms), that refers more widely to a street training practice very oriented on the use of apparatus (horizontal bar) and the improvement of strength and dexterity of upper parts of the body (arms, chest, back).
Source: Wikipedia