A lofty coniferous Chilian tree (Araucaria imbricata), the branches of which are so crowded and intertwisted "as to puzzle a monkey to climb." The edible nuts are over an inch long, and are called pion by the Chilians.
MONKEY'S PUZZLE
Meaning of MONKEY'S PUZZLE in English
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012