fenestratedPronunciation: /ˈfɛnəˌstreɪtɪd, fɪˈnɛstreɪtɪd/Definition of fenestrated adjective 1provided with a window or windows:the fenestrated heights of nearby buildings 2chiefly Anatomy having perforations, apertures, or transparent areas:the capillaries have a fenestrated epitheliumOrigin: early 19th century: from Latin fenestrare (see fenestrate) + -ed1fenestrated in other Oxford dictionaries Definition of fenestrated in the US English dictionary