histogen noun. ['hɪstǝ(ʊ)dʒ(ǝ)n] E20.
[from HISTO- + -GEN.]
Botany. Each of three layers (dermatogen, periblem, and plerome) supposedly distinguishable in an apical meristem, which is now usu. regarded as comprising tunica and corpus. Chiefly in histogen theory.

[TahlilGaran] English Dictionary ▲