cambium(redirected from cambiums)
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n. pl. cam·bi·ums or cam·bi·a (-bē-ə)
A lateral meristem in vascular plants, including the vascular cambium and cork cambium, that forms parallel rows of cells resulting in secondary tissues.
[Medieval Latin, exchange, from Late Latin cambīre, cambiāre, to exchange, of Celtic origin.]
n, pl -biums or -bia (-bɪə)
(Botany) botany a meristem that increases the girth of stems and roots by producing additional xylem and phloem. See also cork cambium
[C17: from Medieval Latin: exchange, from Late Latin cambiāre to exchange, barter]
cam•bi•um(ˈkæm bi əm)
n., pl. -bi•ums, -bi•a (-bi ə)
a layer of meristematic plant tissue, between the inner bark and wood, that produces new bark and wood cells, causing the stem or trunk to grow in diameter and forming the annual ring in trees.
[1665–75; < Late Latin: an exchange, barter, derivative of Latin cambiāre to exchange]
A tissue in the stems and roots of many seed-bearing plants, consisting of cells that divide rapidly to form new layers of tissue. The cambium is most active in woody plants, where it lies between the bark and wood of the stem. It is usually missing from monocotyledons, such as the grasses. ♦ The vascular cambium forms tissues that carry water and nutrients throughout the plant. On its outer surface the vascular cambium forms new layers of phloem, and on its inner surface, new layers of xylem. The growth of these new tissues causes the diameter of the stem to increase. ♦ The cork cambium creates cells that eventually become bark on the outside and cells that add to the cortex on the inside.
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|Noun||1.||cambium - a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth|
vascular tissue - tissue that conducts water and nutrients through the plant body in higher plants
|2.||cambium - the inner layer of the periosteum|
periosteum - a dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone
stratum - one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)