diff --git a/docs/html/fpdoc.css b/docs/html/fpdoc.css
index d7ba7c96bc..a420febd40 100644
--- a/docs/html/fpdoc.css
+++ b/docs/html/fpdoc.css
@@ -127,3 +127,26 @@ span.bartitle {
   font-style: italic;
   color: darkblue
 }
+/* definition list */
+dl {
+  border: 3px double #ccc;
+  padding: 0.5em;
+}
+
+/* definition list: text */
+dt {
+  float: left;
+  clear: left;
+  min-width: 100px;
+  text-align: right;
+  font-weight: bold;
+  color: green;
+}
+
+/* definition list: description or content */
+dd {
+  margin: 0 0 0 110px;
+  padding: 0 0 0.5em 0;
+}
+
+