lamprey: [12] The words lamprey and limpet [OE] come from the same source: medieval Latin lamprēda. This was an alteration of an earlier, 5th-century lampetra, which has been plausibly explained as literally ‘stone-licker’ (from Latin lambēre ‘lick’, source of English lambent, and petra ‘stone’). The reason for applying such a name to the limpet is fairly obvious – it clings fast to rocks – but in fact the lamprey too holds on to rocks, with its jawless sucking mouth. => lambent, limpet, petrol[lamprey etymology, lamprey origin, 英语词源]