incubatory,a.|ˈɪnkjuːbeɪtərɪ| [f. L. incubāt-(see incubate) + -ory.] Of or pertaining to incubation; incubative. 1877Huxley Anat.Inv.Anim. x. 622 For distinction's sake the incubatory pouch may be termed the ovicyst.1879― Hume v. 110 The incubatory instinct of a bird.