diff --git a/site/en/guides/thread-primer/node-roles-and-types.md b/site/en/guides/thread-primer/node-roles-and-types.md
index 94283b48..41617c27 100644
--- a/site/en/guides/thread-primer/node-roles-and-types.md
+++ b/site/en/guides/thread-primer/node-roles-and-types.md
@@ -8,7 +8,7 @@
 
 In a Thread network, nodes are split into two forwarding roles:
 
-### Router
+### Router or Thread Mesh Extender
 
 A Router is a node that:
 
@@ -16,6 +16,9 @@ A Router is a node that:
 *   provides secure commissioning services for devices trying to join the network
 *   keeps its transceiver enabled at all times
 
+Routers must be denominated "Thread Mesh Extenders" for all consumer-facing communications,
+but documentation and technical publications might also use the legacy "Router" terminology.
+
 ### End Device
 
 An End Device (ED) is a node that: