ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷niks, -ēks noun plural but sometimes singular in construction
Etymology: cali- + Greek sthen os strength + English -ics
1. : systematic exercises performed usually in rhythm and often in a group without apparatus or with light hand apparatus to improve the strength, suppleness, balance, and health of the body
2. usually singular in const : the art or practice of calisthenics