There are multiple definitions:

1. independent variable(English)

   • DA, DV, SPSS
   • Statistics

2. instrumental variable(English)

   • genetic variants are used to infer the effect of an exposure variable on the outcome variable
   • MR
   • Genomics
   • https://www.ncb…books/NBK62433/

3. intradaily variability(English)

   • IS, MCTQ, MSF, NCGG, RAR, SGS
   • Variability / oscillation, Circadian rhythm, Sleep medicine
   • https://doi.org…28.2019.1626416

4. ichthyosis vulgaris(Latin)

   • the most common disorder of cornification, with an estimated prevalence of 1:250–1:1000. It is inherited in an autosomal dominant manner and is caused by loss-of-function mutations in the filaggrin gene. Atopic dermatitis and keratosis pilaris are frequently observed in patients with IV
   • AD
   • Dermatology, Genetics
   • https://doi.org…86456-7.03506-1