meristem(redirected from Shoot apical meristem)
Also found in: Thesaurus, Medical, Acronyms, Encyclopedia.
Related to Shoot apical meristem: Root Apical Meristem
The undifferentiated plant tissue from which new cells are formed, as that at the tip of a stem or root.
[Greek meristos, divided (from merizein, to divide, from meris, division; see (s)mer- in Indo-European roots) + -em (as in xylem phloem).]
mer′i·ste·mat′ic (-stə-măt′ĭk) adj.
(Botany) a plant tissue responsible for growth, whose cells divide and differentiate to form the tissues and organs of the plant. Meristems occur within the stem (see cambium) and leaves and at the tips of stems and roots
[C19: from Greek meristos divided, from merizein to divide, from meris portion]
embryonic tissue in plants; undifferentiated, growing, actively dividing cells.
[1870–75; < Greek merist(ós) divided, distributed + -em < Greek -ēma]
Plant tissue whose cells actively divide to produce new tissues that cause the plant to grow. The cells of the meristem are not specialized but can become specialized to form the tissues of roots, leaves, and other plant parts. The growing tips of roots and stems and the tissue layer known as cambium are part of a plant's meristem.
Plant tissue consisting of rapidly dividing cells.