Definition of semilethal in English:

Share this entry


Pronunciation: /ˌsemēˈlēTHəl/ Pronunciation: /ˌsemˌī-/


Relating to or denoting an allele or chromosomal abnormality that impairs the viability of most of the individuals homozygous for it.
Example sentences
  • A chief difficulty in arguing for macroevolution by mutations is the fact that most expressed mutations are either lethal or semi-lethal.
  • Some of the genes that gives the mouse its common colours or markings also makes the mouse sick, or unfit to live. These genes are called semi-lethal or lethal.
  • Pokey (pok), a sex-linked recessive semi-lethal gene in Tribolium castaneum has been described.

For editors and proofreaders

Syllabification: sem·i·le·thal

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.