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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.