鞘 - sheath, case, margin

interest margin

tenosynovitis

to slip out of one's scabbard (of swords)

myelin sheath (around the axon of a neuron)

margin; spread (in prices)

sea squirt; ascidian

to draw a sword

schwannoma; neurilemmoma

coleoptile; acrospire

sea pineapple (Halocynthia roretzi)

outer roofed structure for protecting cultural assets and historic sites

leaf sheath; vagina