diff --git a/ch02_overview.adoc b/ch02_overview.adoc
index e6bfce67..d6da59ef 100644
--- a/ch02_overview.adoc
+++ b/ch02_overview.adoc
@@ -129,7 +129,7 @@ register.
 [NOTE]
 ====
 The
-Bitcoin network can transact in fractional values, e.g., from
+Bitcoin network((("bitcoins", "fractional values")))((("fractional values of bitcoins")))((("satoshis")))((("millibitcoins"))) can transact in fractional values, e.g., from
 millibitcoin (1/1000th of a bitcoin) down to 1/100,000,000th of a
 bitcoin, which is known as a satoshi.  This book uses the same
 pluralization rules used for dollars and other traditional currencies