When you have no limbs. ( legs or arms ).
The condition of having four fingers instead of five is known as "tetramelia." Individuals with this condition may be born with it or may lose fingers due to injury or medical conditions. Tetramelia can affect one or both hands, and the specific naming of individuals would depend on their unique circumstances.
Tetramelia Amelia: the total absence of a limb from birth. Tetra: prefix meaning "four." Tetramelia: The condition of being born with all four limbs absent.