| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
|---|---|
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| AI | accidental injury; accidentally incurred; adiposity index; aggregation index; allergy and immunology... |
| CMI | carbohydrate metabolism index; care management integration; case mix index; cell-mediated immunity; ... |
| FC | fasciculus cuneatus; fast component [of a neuron]; febrile convulsions; feline conjunctivitis; ferri... |