mortarless en · ADJ
Etymology
From mortar + -less.
Meanings
-
(not-comparable) Without mortar.
Sites built by ancient civilizations whose construction techniques are not settled fact — like Stonehenge and the perfectly fitting but mortarless walls of the Inca at Machu Picchu, as well as the pyramids — are embraced as evidence that those civilizations had mystical powers.
2007 April 29, Ethan Todras-Whitehill, “Touring the Spirit World”, in New York Times: