| aqueous | (adjective) produced by the action of water | Synonyms: sedimentary |
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| (adjective) similar to or containing or dissolved in water | - |
| opaque | (adjective) not transmitting or reflecting light or radiant energy; impenetrable to sight | - |
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| (adjective) hard or impossible to understand | Synonyms: unintelligible |
| radiopaque | (adjective) not transparent to X-rays or other forms of radiation | Synonyms: radio-opaque |
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| semiopaque | (adjective) partially opaque | - |
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| subaqueous | (adjective) growing or remaining under water | Synonyms: subaquatic, submerged, submersed, underwater |
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