1. Full of submerged reefs or sandbanks or shoals
   "reefy shallows"
   - shelfy, shelvy, shoaly

See also: reef, shallow

• Ornithorhynchidae
• Ornithorhynchus
• Ornithorhynchus anatinus
• ornithosis
• Orobanchaceae
• orogeny
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• orphan
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• orphenadrine
• Orpheus