‖n. pl. [ NL., fr. radiatus, p. p. See Radiate. ] (Zool.) An extensive artificial group of invertebrates, having all the parts arranged radially around the vertical axis of the body, and the various organs repeated symmetrically in each ray or spheromere. [ 1913 Webster ]

☞ It includes the cœlenterates and the echinoderms. Formerly, the group was supposed to be a natural one, and was considered one of the grand divisions of the animal kingdom. [ 1913 Webster ]

a. [ L. radiatus, p. p. ] 1. Having rays or parts diverging from a center; radiated; as, a radiate crystal. [ 1913 Webster ]

2. (Bot.) Having in a capitulum large ray florets which are unlike the disk florets, as in the aster, daisy, etc. [ 1913 Webster ]

3. (Zool.) Belonging to the Radiata. [ 1913 Webster ]

n. (Zool.) One of the Radiata. [ 1913 Webster ]

v. t. 1. To emit or send out in direct lines from a point or points; as, to radiate heat. [ 1913 Webster ]

2. To enlighten; to illuminate; to shed light or brightness on; to irradiate. [ R. ] [ 1913 Webster ]

v. i. [ imp. & p. p. Radiated p. pr. & vb. n. Radiating. ] [ L. radiatus, p. p. of radiare to furnish with spokes or rays, to radiate, fr. radius ray. See Radius, Ray a divergent line. ] 1. To emit rays; to be radiant; to shine. [ 1913 Webster ]

Virtues shine more clear
In them [ kings ], and radiate like the sun at noon. Howell. [ 1913 Webster ]

2. To proceed in direct lines from a point or surface; to issue in rays, as light or heat. [ 1913 Webster ]

Light radiates from luminous bodies directly to our eyes. Locke. [ 1913 Webster ]

a. 1. Emitted, or sent forth, in rays or direct lines; as, radiated heat. [ 1913 Webster ]

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. [ 1913 Webster ]

3. (Zool.) Belonging to the Radiata. [ 1913 Webster ]

adv. In a radiate manner; with radiation or divergence from a center. [ 1913 Webster ]

a. (Bot.) Having the principal veins radiating, or diverging, from the apex of the petiole; -- said of such leaves as those of the grapevine, most maples, and the castor-oil plant. [ 1913 Webster ]

a. (Bot.) Having the marginal florets enlarged and radiating but not ligulate, as in the capitula or heads of the cornflower. Gray. [ 1913 Webster ]

n. [ L. radiatio: cf. F. radiation. ] 1. The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness. [ 1913 Webster ]

2. The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat. [ 1913 Webster ]