semilethal

noun

semi·​le·​thal ˌse-mē-ˈlē-thəl 

ˌse-ˌmī-,

-mi-

: a mutation that in the homozygous condition produces more than 50 percent mortality but not complete mortality

semilethal adjective

Word History

First Known Use

1919, in the meaning defined above

Medical Definition

semilethal

noun

semi·​le·​thal -ˈlē-thəl 

: a mutation that in the homozygous condition produces more than 50 percent mortality but not complete mortality

semilethal adjective