lethal
adjective
- Of, relating to, or causing death
"death by lethal injection"
- Capable of causing death
"lethal chemicals"
- Gravely damaging or destructive devastating
"a lethal attack on his reputation"
- Very potent or effective
"a lethal fastball"
noun
- An abnormality of genetic origin causing the death of the organism possessing it
- Lethal gene
noun
- A gene that in some (such as homozygous) conditions may prevent development or cause the death of an organism or its germ cells
Source: merriam-webster.com
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