[css-sizing-3][editorial] Add some more dfn terms and links.

Author: tabatkins

css-sizing-3/Overview.bs

@@ -88,7 +88,7 @@ Terminology</h2>
 		<dd>
 			A one- or two-dimensional measurement:
 			a <a>block size</a> and/or <a>inline size</a>;
-			alternatively a width and/or height.
+			alternatively a [=width=] and/or [=height=].
 
 			<figure>
 				<img style="max-width: 49%;" src="images/sizing-ltr-tb.svg"
@@ -103,13 +103,13 @@ Terminology</h2>
 				to an <a>inline size</a> or <a>block size</a> depends on the <a>writing mode</a>.</figcaption>
 			</figure>
 
-		<dt><dfn>inner size</dfn>
+		<dt><dfn lt="inner size|inner width|inner height|inner block size|inner inline size">inner size</dfn>
 		<dd>
-			The <a href="https://www.w3.org/TR/css2/box.html#box-dimensions">content-box</a> size of a <a>box</a>.
+			The <a href="https://www.w3.org/TR/css2/box.html#box-dimensions">content-box</a> [=size=] of a <a>box</a>.
 
-		<dt><dfn>outer size</dfn>
+		<dt><dfn lt="outer size|outer width|outer height|outer block size|outer inline size">outer size</dfn>
 		<dd>
-			The <a href="https://www.w3.org/TR/css2/box.html#box-dimensions">margin-box</a> size of a <a>box</a>.
+			The <a href="https://www.w3.org/TR/css2/box.html#box-dimensions">margin-box</a> [=size=] of a <a>box</a>.
 
 		<dt><dfn id="definite" lt="definite|definite size">definite size</dfn>
 		<dd>