Learn how to say Radiational correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word radiate:
1 [with object] emit (energy, especially light or heat) in the form of rays or waves:
the hot stars radiate energy
[no object, with adverbial of direction] (of light, heat, or other energy) be emitted in the form of rays or waves:
the continual stream of energy which radiates from the sun
(of a person) clearly emanate (a strong feeling or quality) through their expression or bearing:
she lifted her chin, radiating defiance
(radiate from) (of a feeling or quality) emanate clearly from:
leadership and confidence radiate from her
2 [no object, with adverbial of direction] diverge or spread from or as if from a central point:
he ran down one of the passages that radiated from the room
(as adjective radiated) used in names of animals with markings arranged like rays, e.g. radiated tortoise.
Biology (of an animal or plant group) evolve into a variety of forms adapted to new ways of life.
arranged in or having a radial pattern:
the radiate crown
radiate (sense 1 of the verb).