[doo-rey-min, dyoo-] 
| du·ra·men (dŏŏ-rā'mən, dyŏŏ-) n. Botany See heartwood. [Latin dūrāmen, hard growth of a vine, from dūrāre, to harden, from dūrus, hard; see deru- in Indo-European roots.] |
| heart·wood (härt'wŏŏd') n. The older, nonliving central wood of a tree or woody plant, usually darker and harder than the younger sapwood. Also called duramen. |