single-leaf sing·le·leaf uncommon noun 1. pinon of southwestern United States having solitary needles and often many stems; important as a nut pine Synonymssingle-leaf pinesingle-leaf pinyonPinus monophylla Related words Word family single-leaf pinesingle-leaf pinyon Broader terms nut pine WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
