from The Century Dictionary and Cyclopedia
- n. An ecclesiastical vestment, not unlike the casula or chasuble, peculiar to the Gallican church of the eighth and ninth centuries.
Sorry, no etymologies found.
If the weather was particularly severe an amphibalus, or double mantle, was permitted.
Called in Latin casula planeta or pænula, and in early Gallic sources amphibalus, the principal and most conspicuous Mass vestment, covering all the rest.
It is also probable that the name Amphibalus is derived from some version of the legend in which the cleric's cloak is called an amphibalus; for Geoffrey of Monmouth, the earliest witness to the name Amphibalus, makes precisely the same mistake in another passage, converting the garment called amphibalus into the name of a saint.