• (a.) Of or pertaining to roots, or the root of a plant.
Pertaining to the root.
Referring to the nerve roots which originate in the spine.
(rә-dik´u-lәr) of or pertaining to a root or radicle.
Ra·dic'u·lar (rȧ*dĭk'u*lẽr) adjective Of or pertaining to roots, or the root of a plant. 
Type: Term Pronunciation: ra-dik′yū-lăr Definitions: 1. Relating to a radicle. 2. Pertaining to the root of a tooth.