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Definition of Apical ectodermal ridge
1. Noun. (context: embryology) A formation of ectodermal cells that occurs at the distal end of each limb bud and functions as the primary signaling point to secure the proper development of a limb. ¹
¹ Source: wiktionary.com
Medical Definition of Apical ectodermal ridge
1. The layer of surface ectodermal cells at the apex of the embryonic limb bud; considered to exert an inductive influence on the condensation of underlying mesenchyme. (05 Mar 2000)