cambium
UK /ˈkambɪəm/ · US /ˈkeə̯m.biˌəm/ noun
Forms cambiums cambia
- noun (botany) A layer of cells between the xylem and the phloem that is responsible for the secondary growth of roots and stems.
- noun (anatomy) Periosteum, a membrane that covers the outer surface of bones
- noun (obsolete) One of the humours formerly believed to nourish the bodily organs.
Etymology
Borrowed from Late Latin cambium (“a change”), from Gaulish. Doublet of change.
Webster’s 1913
- noun A series of formative cells lying outside of the wood proper and inside of the inner bark. The growth of new wood takes place in the cambium, which is very soft.
- noun A fancied nutritive juice, formerly supposed to orgiginate in the blood, to repair losses of the system, and to promote its increase. Dunglison.
Etymology [LL. cambium exchange, fr. L. cambire to exchange. It was supposed that cambium was sap changing into wood.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “cambium”, CC BY-SA 4.0. Details