Definition of tagma in English:

tagma

Pronunciation /ˈtaɡmə/ /ˈtæɡmə/

nountagmata

Zoology
  • (in the bodies of arthropods and some other segmented animals) a morphologically distinct region, typically comprising several adjoining segments, such as the head, thorax, and abdomen of insects.

Origin

Early 20th century from Greek, literally ‘something arranged’, from tassein ‘set in order’.