'Meristem' definitions:
Definition of 'meristem'
(from WordNet)
noun
Undifferentiated tissue from which new cells are formed, as at the tip of a stem or root
Definition of 'Meristem'
From: GCIDE
- Meristem \Mer"i*stem\, n. [Gr. ? divisible.] (Bot.) A tissue of growing cells, or cells capable of further division. [1913 Webster]