say it: kal-uhs-THEN-iks
calisthenics is a noun meaning "the practice of calisthenic exercises". It carries 2 recorded senses.
the practice of calisthenic exercises
“calisthenics is recommended for general good health”
light exercises designed to promote general fitness
“several different calisthenics were illustrated in the video”
plural
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for calisthenics come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.