Of or pertaining to a mirror; capable of reflecting objects: as, a specular surface; a specular mineral; specular metal (an alloy prepared for making mirrors).Assisting or facilitating vision; serving for inspection or observation; affording a view: as, a specular orb (the eye or a lens); specular stone (an old name for mica used in windows, in Latin specularis lapis); a specular tower (one serving as a lookout).In ornithology, of or pertaining to the speculum of the wing; ocellar: as, the specular area; specular iridescence.