f

• atomic orbital with angular momentum quantum number 3;

• farad;

• fasting;

• father;

• female;

• femto-;

• fiber, fibrous;

• fingerbreadth;

• fission;

• flexion;

• fluid;

• focal;

• foot;

• form, forma;

• formula;

• fostered [experimental animal];

• fraction;

• fracture;

• fragment;

• frequency [statistics];

• frontal;

• function;

• fundus;

• numerical expression of the relative aperture of a camera lens