\Ra"di*a`ted\, a. 1. Emitted, or sent forth, in rays or direct lines; as, radiated heat. 2. Formed of, or arranged like, rays or radii; having parts or markings diverging, like radii, from a common center or axis; as, a radiated structure; a radiated group of crystals. 3. (Zo["o]l.) Belonging to the Radiata.