• synonyms


[al-bur-nuh m]
noun Botany.
  1. sapwood.
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Origin of alburnum

1655–65; < Latin, equivalent to alb(us) white + -urnum neuter noun suffix
Related formsal·bur·nous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for alburnum

Historical Examples

  • This consists in cutting a ring round the tree with axes through the bark and sapwood, or alburnum, into the brown wood beneath.

    Australia The Dairy Country

    Australia Department of External Affairs

  • A new layer of wood, or rather of alburnum, is added annually to the tree in every part just under the bark.

  • Alburnum, al-burn′um, n. in trees, the white and soft parts of wood between the inner bark and the heart-wood.

  • The mixture of bark and alburnum was next placed upon a smooth stone, and mashed into a fibre of a yellowish colour.

  • It permits the passage of sap and is known as sapwood (Alburnum).

British Dictionary definitions for alburnum


  1. a former name for sapwood
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Word Origin

C17: from Latin: sapwood, from albus white
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012