SAPWOOD

sapwood

(noun) newly formed outer wood lying between the cambium and the heartwood of a tree or woody plant; usually light colored; active in water conduction

Source: WordNet® 3.1

Etymology

Noun

sapwood (countable and uncountable, plural sapwoods)

The wood just under the bark of a stem or branch, different in color from the heartwood.

Synonyms

• alburnum

Antonyms

• heartwood

Source: Wiktionary

Sap"wood`, n. (Bot.)

Definition: The alburnum, or part of the wood on any exogenous tree next to the bark, being that portion of the tree through which the sap flows most freely; -- distinguished from Heartwood.

Source: Webster’s Unabridged Dictionary 1913 Edition