cataract

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. an eye disease that involves the clouding or opacification of the natural lens of the eye
• Hypernyms:
eye disease
• Hyponyms:
cortical cataract, nuclear cataract, posterior subcapsular cataract
2. a large waterfall;
violent rush of water over a precipice
• Hypernyms:
waterfall, falls