diff --git a/extra/quadtrees/quadtrees.factor b/extra/quadtrees/quadtrees.factor
index 95befc24fe..b29af13f12 100644
--- a/extra/quadtrees/quadtrees.factor
+++ b/extra/quadtrees/quadtrees.factor
@@ -59,7 +59,7 @@ DEFER: in-rect*
 : ur-bounds ( rect -- rect' )
     [ [ loc>> ] [ dim>> { 0.5 0.5 } v* ] bi v+ ] [ child-dim ] bi <rect> ;
 
-: {quadrants} ( node -- quadrants )
+: node>quadrants ( node -- quadrants )
     { [ ll>> ] [ lr>> ] [ ul>> ] [ ur>> ] } cleave 4array ;
 
 : add-subnodes ( node -- node )
@@ -120,17 +120,17 @@ DEFER: in-rect*
 : erase ( point tree -- )
     dup leaf?>> [ leaf-erase ] [ node-erase ] if ;
 
-: (?leaf) ( quadrant -- {point,value}/f )
+: (?leaf) ( quadrant -- pair/f )
     dup point>> [ swap value>> 2array ] [ drop f ] if* ;
-: ?leaf ( quadrants -- {point,value}/f )
+: ?leaf ( quadrants -- pair/f )
     [ (?leaf) ] map sift dup length {
         { 1 [ first ] }
         { 0 [ drop { f f } ] }
         [ 2drop f ]
     } case ;
 
-: collapseable? ( node -- {point,value}/f )
-    {quadrants} { [ [ leaf?>> ] all? ] [ ?leaf ] } 1&& ;
+: collapseable? ( node -- pair/f )
+    node>quadrants { [ [ leaf?>> ] all? ] [ ?leaf ] } 1&& ;
 
 : remove-subnodes ( node -- leaf ) f >>ll f >>lr f >>ul f >>ur t >>leaf? ;
 
@@ -162,7 +162,7 @@ DEFER: in-rect*
 
 : leaf= ( a b -- ? ) [ [ point>> ] [ value>> ] bi 2array ] same? ;
 
-: node= ( a b -- ? ) [ {quadrants} ] same? ;
+: node= ( a b -- ? ) [ node>quadrants ] same? ;
 
 : (tree=) ( a b -- ? ) dup leaf?>> [ leaf= ] [ node= ] if ;