duramenn.

/djʊˈreɪmɛn/

Etymology: rare Latin dūrāmen hardness; a hardened or ligneous vine-branch (Columella), < dūrāre to harden.

Botany.

The central wood or heart-wood of an exogenous tree.

ΘΚΠ

the world > plants > part of plant > part of tree or woody plant > wood > [noun] > heart-wood or duramen

heart1324

core1604

spine1630

duramen1837

1837 Penny Cycl. IX. 205/1.

1839 W. B. Carpenter Princ. Gen. & Compar. Physiol. §329 The deposition of the products of secretion which gives strength and firmness to the duramen, destroys or greatly diminishes its power of transmitting fluid.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 133 The inner layers of alburnum are gradually transformed into duramen..the cell-walls assuming a darker colour, from saturation with resin, colouring-substances, etc. The distinction between alburnum and duramen is very clear and well-marked in the oak, walnut, cherry, elm..brazil wood, etc.

This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2021).

单词	duramen
释义	duramenn. /djʊˈreɪmɛn/ Etymology: rare Latin dūrāmen hardness; a hardened or ligneous vine-branch (Columella), < dūrāre to harden. Botany. The central wood or heart-wood of an exogenous tree. ΘΚΠ the world > plants > part of plant > part of tree or woody plant > wood > [noun] > heart-wood or duramen heart1324 core1604 spine1630 duramen1837 1837 Penny Cycl. IX. 205/1. 1839 W. B. Carpenter Princ. Gen. & Compar. Physiol. §329 The deposition of the products of secretion which gives strength and firmness to the duramen, destroys or greatly diminishes its power of transmitting fluid. 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 133 The inner layers of alburnum are gradually transformed into duramen..the cell-walls assuming a darker colour, from saturation with resin, colouring-substances, etc. The distinction between alburnum and duramen is very clear and well-marked in the oak, walnut, cherry, elm..brazil wood, etc. This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2021). < n.1837
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