| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024cat•a•ract /ˈkætəˌrækt/USA pronunciation n. [countable]- a descent of water over a steep surface.
- Ophthalmologyan abnormal growth on the lens of the eye:to remove cataracts by laser surgery.
WordReference Random House Unabridged Dictionary of American English © 2024cat•a•ract (kat′ə rakt′),USA pronunciation n. - a descent of water over a steep surface;
a waterfall, esp. one of considerable size. - any furious rush or downpour of water;
deluge. - Ophthalmology
- an abnormality of the eye, characterized by opacity of the lens.
- the opaque area.
- Greek katarráktēs waterfall, floodgate, portcullis (noun, nominal), downrushing (adjective, adjectival), akin to katarássein to dash down, equivalent. to kat- cata- + arássein to smite
- Latin catar(r)acta
- Middle English cataracte 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers:: cataract /ˈkætəˌrækt/ n - a large waterfall or rapids
- a deluge; downpour
- partial or total opacity of the crystalline lens of the eye
- the opaque area
Etymology: 15th Century: from Latin catarracta, from Greek katarrhaktēs, from katarassein to dash down, from arassein to strike |