Definition of "tunica"

The tunica is made of a very rich material, plain silk or brocade, with an ornamental border, and over it is the paludamentum or semicircular cloak which was coming into very general use at this period. The collar is a separate article, and is of rich embroidery to match that on the bottom of the tunica.

1924, Herbert Norris, Costume & Fashion, London, Toronto, Ont.: J. M. Dent and Sons Ltd.; New York, N.Y.: E. P. Dutton and Co., page 180

I was being drawn up into the clouds, and Papinian, who in my vision was wearing a tunica of light, was fluttering about, his butterfly wings flapping noisily.

1988, S.P. Somtow, “A Tale of Truffles”, in Aquila and the Sphinx, Wildside Press, published 2001, page 171

It was then that I noticed some of them were wearing tunicas.

2020, Rob Steiner, Natta Magus, Quarkfolio Books

Ecto- and endotunicae thin, hardly discernable as two tunicae in unreleased, unstained asci; without zonation and ring structures; ocular chamber indistinct.

1980, Opera Botanica, page 107, column 2

The hyaloid system and its associated vascular tunicas are responsible for providing vascular and metabolic support to the lens during embryological development.

2013, David Maggs, Paul Miller, Ron Ofri, “Development and Congenital Abnormalities”, in Slatter’s Fundamentals of Veterinary Ophthalmology, 5th edition, Saunders, page 21

Fig. 15.5 Tunicae of arteries and veins showing the thicker walls of the arteries.

2021, Jacquelyn Banasik, “Alterations in Blood Flow”, in Pathophysiology, 7th edition, Elsevier, Inc., section “Principles of Flow”, page 323, column 2