tunica

noun2

1. •
   Synonym of tunic (“covering”).

   • Ecto- and endotunicae thin, hardly discernable as two tunicae in unreleased, unstained asci; without zonation and ring structures; ocular chamber indistinct. — 1980
2. •
   Synonym of tunic (“garment”).

   • 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

noun[plural only]1

1. •
   An extinct group of linguistically and culturally related Native American tribes in the Mississippi River Valley.