Alburnum

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    sapwood; the soft, newer wood in the trunk of a tree found between the bark and the hardened heartwood. uncountable, usually

Etymology

From Latin alburnum, from albus (“white”), since it is often paler in color than the heartwood.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.