There are multiple definitions:

1. fat-free body mass(English)

   • see also allometry
   • BMI, BSA, CO, SV, SWT
   • Adiposity, Diet

2. fractional myocardial mass(English)

   • calculated using a stem-and-crown model based on the allometric scaling between length of coronary arterial tree and LV myocardial mass
   • CCTA, LV, DS
   • Cardiology, Ratio-based metric, Coronary circulation
   • https://doi.org…cct.2019.11.001

3. Five-Factor Model(English)

   • refers to general personality structure and consists of the five broad domains of neuroticism (or emotional instability vs. stability), extraversion (vs. introversion), openness (or unconventionality), agreeableness (vs. antagonism), and conscientiousness (or constraint vs. disinhibition)
   • DSM, ICD, ESEM, NEO-FFI, FFI
   • Psychology
   • https://doi.org….1002/wps.20658