CAMBIUMS
Noun
cambiums
plural of cambium
Source: Wiktionary
CAMBIUM
Cam"bi*um, n. Etym: [LL. cambium exchange, fr. L. cambire to
exchange. It was supposed that cambium was sap changing into wood.]
1. (Bot.)
Definition: 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.
2. (Med.)
Definition: A fancied nutritive juice, formerly supposed to orgiginate in
the blood, to repair losses of the system, and to promote its
increase. Dunglison.
Source: Webster’s Unabridged Dictionary 1913 Edition