Cambium

• POS: Noun
• HYPHEN: cam=bi=um

CIDE DICTIONARY

Cambium, n. [LL. cambium exchange, fr. L. cambire to exchange. It was supposed that cambium was sap changing into wood.].

•  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.  [1913 Webster]
•  A fancied nutritive juice, formerly supposed to originate in the blood, to repair losses of the system, and to promote its increase.  Dunglison.  [1913 Webster]

OXFORD DICTIONARY

Cambium, n. (pl. cambia or cambiums) Bot. a cellular plant tissue responsible for the increase in girth of stems and roots.

Derivative

cambial adj.

Etymology

med.L, = change, exchange