from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A cloak, worn in ancient times by the Gauls, early Germans, and Roman soldiers, made of a rectangular piece of (usually red) coarse cloth and fastened on the right shoulder.
from the GNU version of the Collaborative International Dictionary of English
- n. The military cloak of the Roman soldiers.
from The Century Dictionary and Cyclopedia
- n. A military cloak worn by ancient Roman soldiers and inferior officers, in contradistinction to the paludamentum of the superior officers. It was the garb of war, as the toga was the garb of peace.
Sorry, no etymologies found.
Applico me illi proximius et spisse deosculata sagum peto.
The Gauls in their pride stripped themselves of the sagum; they showed their great white bodies from a distance, and they enlarged their wounds to terrify the enemy.
A proclamation was issued to the effect that it was no longer necessary for Roman citizens to wear the sagum.
"Come in, come in!" said Gaius Julius Caesar, welcoming his guest in person at the door, and holding out his own finely made hands to receive the awful sagum.
They turned to walk back into the house, where Caesar sent a sleepy servant to fetch the old sagum for its owner.
However, he had thrown his old campaigning sagum over his finery — a thick, greasy, malodorous cape which could keep out the perishing winds of the alpine passes or the soaking days-long downpours of Epirus.
In his order of battle, he placed their cavalry on the right wing, and in the centre their infantry, whom he united to the Spanish infantry, and whom he commanded in person: the Gaulish foot, as was their custom on all occasions when they were determined to conquer or die, threw off their tunic and sagum, and fought naked from their waist upwards, armed with their long and pointless sabres.
The clothing common to all is a sagum  fastened by a clasp, or, in want of that, a thorn.
Mela (iii. 3), speaking of the Germans, says, "The men are clothed only with the sagum, or the bark of trees, even in the depth of winter."
By a German council of 742, priests and deacons are bidden to wear habitually not the sagum, or short military cloak, but the casula (chasuble), which even then had not become an exclusively liturgical dress.