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WordNet-Online 
 Definitions from WordNet | ||||
| Definitions from the WebLethal GeneDefinition: A lethal gene refers to a gene that, when present in an organism's genetic makeup, leads to the death of the organism or significantly reduces its life expectancy. Sample sentences: 
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| leterme leters lethagy lethal lethal agent lethal arrhythmias lethal charm lethal dose lethal gene lethality lethargic lethargic encephalitis lethargically lethargy lethargy  lethbridge lethe 
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