殻 - husk, nut shell

diastrophism (movement and deformation of the earth's crust)

shell; husk; hull; pod; chaff

cigarette end; cigarette butt; tobacco ashes

seashell; shell

(Earth's) crust

shellfish allergy

(coal) cinders

rapeseed hulls

bivalves

conchoidal fracture

adductor muscle (of a bivalve)

titan triggerfish (Balistoides viridescens); giant triggerfish; moustache triggerfish