camphor ball

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a small sphere of camphor or naphthalene used to keep moths away from stored clothing
• Syn:
mothball
• Derivationally related forms:
mothball (for: mothball)
• Hypernyms:
ball, globe, orb
• Substance Meronyms:
camphor, naphthalene