‖ fotusObs. [L. fōtus (-u stem) noun of action from fovēre to warm, cherish.] A fomentation. 1586W. Bailey Preserv. Eye-sight (1633) 21 If the eyes be over-dry, we humect them..with a fotus of Mallows..and Violets.1714Spect.No. 572 ⁋5 The Anodine Fotus.