radiato-|reɪdɪˈeɪtəʊ|used as a comb. form of radiate a. to modify an adj., with the meaning ‘in a radial direction, in the manner of rays’, as radiato-patent, radiato-porose, radiato-striate, radiato-sulcate, radiato-undulate.1819Pantologia X, Radiato-patent, in botany. Radiate-expanding: or, spreading out like rays. Applied to the stigma.1850Dana Geol.App. i. 702 The surface of the cast towards the beak is smooth, and not finely radiato-striate.Ibid. 713 Upper and under-surfaces correspondingly radiato-undulate.1868tr.Figuier's Ocean World v. 119 Cœloptychium,..radiato-porose above, flat and radiato-sulcate below.