a freshwater fish with a round mouth that attaches itself to other fish and drinks their blood 七鳃鳗（以口吸附于其他鱼体，吸食宿主血液） Word OriginMiddle English: from Old French lampreie, from medieval Latin lampreda, probably from Latin lambere ‘to lick’ + petra ‘stone’ (because the lamprey attaches itself to stones using its mouth).