殻

red iron oxide; red ocher

hemp reed; hemp stalk

used tea leaves

ice crust; ice rind; ice shell

Zoology

apex of a shell; umbo

crab shell (often ground or crushed and used as fertilizer); crab shell meal

flail (for threshing grain)

Colloquial

shoulder blade; scapula

Physics

shell structure

remnants of a bean plant; beanstalks and pods; bean husk

ashes

Crustacea

skeleton shrimp (Caprella mutica); spectre shrimp; specter shrimp

Botany

cupule; acorn cup

grounds (of tea and coffee)

sea shell

(coal) cinders

coconut shell

scale insect

Anatomy

putamen (part of brain)

Biology

frustule; silicified cell wall of a diatom

rapeseed hulls

bivalves

Physics

electron shell

empty shell