from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A distinct section of an arthropod, consisting of two or more adjoining segments, such as the cephalothorax of a spider.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A specialized grouping of arthropodan segments, such as the head, the thorax, and the abdomen with a common function.
from The Century Dictionary and Cyclopedia
- n. In botany, a general term applied by Pfeffer to all the various theoretical aggregates of chemical molecules out of which vegetable structure is built up, thus embracing under one head the pleon, micella, and micellar aggregate. See micella, pleon, syntagma.
Each tagma was stationed in a particular area near Constantinople itself; they were highly trained, highly paid, and in return they were expected to accompany the emperor or his general on any foreign campaign.
 The word (...) (tagma) means a body, or troop or corps of soldiers.
Greek tagma, was originally used of any estate in the church, e.g. St. Jerome, On Isaiah v. 19, 18.
Council in Illyricum uses hieratikon tagma in precisely the same way.