also: やしかく
noun
coconut shell
The hard outer shell of a coconut, often used for crafts, charcoal, or as a bowl.
ヤシ殻でできたボウルは軽くて丈夫だ。
Bowls made from coconut shells are light and sturdy.
Refers to the whole coconut fruit or its flesh/milk, while ヤシ殻 specifically means the hard shell.
Compound of ヤシ (coconut palm) and 殻 (shell).