[syn: radial, stellate, radiate]
The Collaborative International Dictionary of English v.0.48:
Radial \Ra"di*al\ (r[=a]"d[i^]*al), a. [Cf. F. radial. See
   Radius.]
   Of or pertaining to a radius or ray; consisting of, or like,
   radii or rays; radiated; as, (Bot.) radial projections;
   (Zool.) radial vessels or canals; (Anat.) the radial artery.
   [1913 Webster]
   Radial symmetry. (Biol.) See under Symmetry.
      [1913 Webster]
WordNet (r) 3.0 (2006):
radial
    adj 1: relating to or near the radius; "the radial aspect of the
           forearm"
    2: relating to or moving along or having the direction of a
       radius; "radial velocity"
    3: issuing in rays from a common center; relating to rays of
       light; "radial heat"
    4: arranged like rays or radii; radiating from a common center;
       "radial symmetry"; "a starlike or stellate arrangement of
       petals"; "many cities show a radial pattern of main highways"
       [syn: radial, stellate, radiate]
    n 1: pneumatic tire that has radial-ply casing [syn: radial,
         radial tire, radial-ply tire]
Moby Thesaurus II by Grady Ward, 1.0:
20 Moby Thesaurus words for "radial":
   approaching, asymptotic, centripetal, centrolineal, concurrent,
   confluent, confocal, connivent, converging, focal, meeting,
   mutually approaching, radiate, radiated, radiating, radiative,
   rayed, tangent, tangential, uniting