かいがら貝殻kaigaraかい貝kaiがらgara
1.
The hard exterior that encases and protects a mollusk, composed mainly of calcium carbonate, formed by secretion from the organism's soft tissues.
2.
A naturally occurring structure found on the beach or in the ocean, typically characterized by its intricate shapes and patterns, often collectable or used in decorative arts.
3.
The protective casing that serves as both a habitat and a defense mechanism for certain marine animals, showcasing the diversity of forms in different species.
4.
An inorganic formation that develops as a result of biological processes, often highlighting environmental conditions and ecological interactions where the mollusk resides.
Example:
トムは美しい貝がらを浜辺でひろった。