Merriam-Webster Collegiate Dictionary - guiscard

 biographical name Robert — see Robert ~ GUISE  I. biographical name  2d Duc de 1519-1563 Francois de Lorraine French soldier & politician  II. biographical name  3d Duc de 1550-1588 Henri I de Lorraine French soldier & politician GUISE  noun  Etymology: Middle English gise, ~, from Anglo-French, of Germanic origin; akin to Old High German wisa manner — more at wise  Date: 13th century  1. a form or style of dress ; costume  2.  a. obsolete manner, fashion  b. archaic a customary way of speaking or behaving  3.  a. external appearance ; semblance  b. pretext