(of a sword etc) to unsheath

scabbard

(invertebrate zoology) ootheca

(botany) leaf sheath

Ascidiacea; sea squirt

(anatomy) tendon sheath

elytrum (hardened forewing of Coleoptera beetle, encasing the flight wing)

sphingolipid

myelin sheath (membrane surrounding axon of nerve cell)

coleoptile, protective sheath covering an emerging shoot (botany)

tenosynovitis (medicine)

Coleoptera (insect order including beetles)