There are multiple definitions:

1. knock-in [technology](English)

   • important for understanding mechanisms underlying gene function and diseases caused by genetic mutations, as well as for developing new therapies for such diseases. Specifically, a study of target-gene KO model phenotypes, resulting from the loss of gene function, may enable the functions of specific genes to be clarified
   • KO, miR-KO, AAG, GAG, KIT, NHP, PAM, ZFN, DSB, TALEN, ssODN, MMEJ
   • Genetics
   • https://doi.org…598-019-49110-3

2. keratoconus index(English)

   • a corneal topometric index
   • CKI, CDVA, CXL, ICL, ICRS, IHA, IHD, ISV, LASIK, UDVA
   • Ophthalmology
   • https://doi.org…97X-20191217-01

3. kinase inhibitor(English)

   • bears the potential to act as radiosensitizer
   • Radiotherapy /radiation
   • https://doi.org…onc.2021.740002

4. Karolinska Institutet(English)

   • Hospital, Organizations (research)
   • https://ki.se/en

5. key informant(English)

   • may refer to their opinions of self-care concerning sexual and reproductive health
   • IUD, SRH
   • Care giver/provider, Health literacy, Woman /female, Sexuality, Communication
   • https://doi.org…978-023-01596-x