| 释义 | tree ring
 tree ringn  (Botany) another name for annual ringan′nual ring′n.   a yearly formation of new wood in woody plants, observable as a ring on the cross section of a tree trunk.  Also called  tree ring.  [1875–80]
 tree ring- Any of the concentric rings of the cross-section of a tree trunk, representing a year's growth, or the layer of wood produced by a year's growth in a woody plant; also called annual ring.See also related terms for tree trunk.TranslationsEncyclopediaSeedendrochronologyThesaurusSeeannual ring |