HEARTWOOD


Meaning of HEARTWOOD in English

/ ˈhɑːtwʊd; NAmE ˈhɑːrt-/ noun

[ U ] the hard older inner layers of the wood of a tree

—compare sapwood

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.