Etymology

tagma

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Today it means: A specialized, structured, grouping of functionally related segments, or analogous subunits, into units such as the head, the thorax, and the abdomen, particularly in various Arthropoda and Vertebrata. Full definition →

Ancient Greek τάγμα (tágma) ← Proto-Hellenic *tat͏̌t͏̌ō ← Proto-Indo-European *teh₂g-
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The story

  1. Proto-Indo-European*teh₂g-
  2. Proto-Hellenic*tat͏̌t͏̌ō
  3. Ancient Greekτάσσω (tássō)
  4. Ancient Greekτάγμα (tágma)
  5. English todaytagma

Borrowed from Ancient Greek τάγμα (tágma, “something which has been ordered or arranged”).

Etymology from Wiktionary, CC BY-SA 4.0.