— calisthenic, calisthenical , adj.
/kal'euhs then"iks/ , n.
1. ( used with a pl. v. ) gymnastic exercises designed to develop physical health and vigor, usually performed with little or no special apparatus.
2. ( used with a sing. v. ) the art, practice, or a session of such exercises.
Also, callisthenics .
[ 1840-50; cali- (var. of CALLI-) + Gk sthén ( os ) strength + -ICS ]