cam·​bi·​um | \ ˈkam-bē-əm How to pronounce cambium (audio) \
plural cambiums or cambia\ ˈkam-​bē-​ə How to pronounce cambium (audio) \

Definition of cambium

: a thin formative layer between the xylem and phloem of most vascular plants that gives rise to new cells and is responsible for secondary growth

Other Words from cambium

cambial \ ˈkam-​bē-​əl How to pronounce cambium (audio) \ adjective

Examples of cambium in a Sentence

Recent Examples on the Web Sometimes the cambium layer, which is the green tissue just under the bark, comes off with the bark. Lynn Coulter, Better Homes & Gardens, 13 June 2022 In winter, most of the living tissue is found in the overwintering buds and in a green layer under the bark called the cambium. Beth Botts,, 10 Apr. 2022 Windham suggests that most cankers are associated with wounds, often during pruning, that open the inner cambium to disease. Nan Sterman, San Diego Union-Tribune, 7 Aug. 2021 Yet the tree was still alive, with just one rope of cambium — the outer bark that transports water and nutrients — snaking up the trunk. Ned Rozell, Anchorage Daily News, 24 July 2021 Till and Shaw cut into the moist and apparently healthy cambium layer of a 70-year-old fir tree lying on the ground. oregonlive, 8 May 2021 The aforementioned cambium layer is green in stems or branches that are still alive. Daniel Cunningham, Dallas News, 24 Feb. 2021 If some of the cambium and outer bark is still intact and wet, quickly lift the branch level to close the wound. oregonlive, 20 Feb. 2021 While this thinning wouldn’t exactly be programmed senescence,the cambium could eventually become too thin to function and kill the tree. Alex Fox, Smithsonian Magazine, 30 July 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cambium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of cambium

1671, in the meaning defined above

History and Etymology for cambium

New Latin, from Medieval Latin, exchange, from Latin cambire to exchange — more at change

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Time Traveler for cambium

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The first known use of cambium was in 1671

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Last Updated

28 Jun 2022

Cite this Entry

“Cambium.” Dictionary, Merriam-Webster, Accessed 5 Jul. 2022.

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More Definitions for cambium


cam·​bi·​um | \ ˈkam-bē-əm How to pronounce cambium (audio) \
plural cambiums or cambia\ -​bē-​ə \

Kids Definition of cambium

: soft tissue in woody plants from which new wood and bark grow

More from Merriam-Webster on cambium Encyclopedia article about cambium


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