People don't like the term 'radius' for box-shadow bits

Author: fantasai

css3-background/Overview.html

@@ -3720,13 +3720,13 @@ <h3 id=the-box-shadow><span class=secno>6.2. </span>The &lsquo;<a
    <li>The second length is the vertical offset. A positive value offsets the
     shadow down, a negative one up.
 
-   <li>The third length is a blur radius. Negative values are not allowed. If
-    the blur radius is zero, the shadow's edge is sharp. Otherwise, the
-    larger the value, the more the shadow's edge is blurred. See below.
+   <li>The third length is a blur value. Negative values are not allowed. If
+    the blur value is zero, the shadow's edge is sharp. Otherwise, the larger
+    the value, the more the shadow's edge is blurred. See below.
 
-   <li>The fourth length is a spread radius. Positive values cause the shadow
-    shape to expand in all directions by the specified radius. Negative
-    values cause the shadow shape to contract. See below. <span
+   <li>The fourth length is a spread distance. Positive values cause the
+    shadow shape to expand in all directions by the specified radius.
+    Negative values cause the shadow shape to contract. See below. <span
     class=note>Note that for inner shadows, expanding the shadow (creating
     more shadow area) means contracting the shadow's perimeter shape.</span>
 
@@ -3754,10 +3754,10 @@ <h3 id=the-box-shadow><span class=secno>6.2. </span>The &lsquo;<a
    class=property>border-image</code></a>&rsquo; does not affect the shape of
    the box-shadow.
 
-  <p>If a spread radius is defined, the shadow is expanded outward by an
-   operation equivalent to applying the absolute value of the spread radius
-   to a blur operation as defined below and thresholding the result such for
-   a positive spread radius all non-transparent pixels are given the full
+  <p>If a spread distance is defined, the shadow is expanded outward by an
+   operation equivalent to applying the absolute value of the spread value as
+   a blur operation as defined below and thresholding the result such that
+   for a positive spread radius all non-transparent pixels are given the full
    shadow color and for a negative spread radius all non-opaque pixels are
    made transparent. The UA may approximate this operation by taking an
    outward outset of the specified amount normal to the original shadow
@@ -3773,10 +3773,10 @@ <h3 id=the-box-shadow><span class=secno>6.2. </span>The &lsquo;<a
    cause an outer shadow to disappear, and an inner shadow to cover the
    entire padding-box.)
 
-  <p>A positive blur radius indicates that the resulting shadow should be
+  <p>A positive blur value indicates that the resulting shadow should be
    blurred, such as by a Gaussian filter. The exact algorithm is not defined;
    however for a long, straight shadow edge, this should create a color
-   transition the length of the blur radius that is perpendicular to and
+   transition the length of the blur distance that is perpendicular to and
    centered on the shadow's edge, and that ranges from the full shadow color
    at the radius endpoint inside the shadow to fully transparent at the
    endpoint outside it.

css3-background/Overview.src.html

@@ -2687,12 +2687,12 @@ <h3 id="the-box-shadow">The 'box-shadow' property</h3>
   <li>The second length is the vertical offset. A positive value
   offsets the shadow down, a negative one up.
 
-  <li>The third length is a blur radius. Negative values are not
-  allowed. If the blur radius is zero, the shadow's edge is sharp.
+  <li>The third length is a blur value. Negative values are not
+  allowed. If the blur value is zero, the shadow's edge is sharp.
   Otherwise, the larger the value, the more the shadow's edge is
   blurred. See below.
 
-  <li>The fourth length is a spread radius. Positive values cause
+  <li>The fourth length is a spread distance. Positive values cause
   the shadow shape to expand in all directions by the specified
   radius. Negative values cause the shadow shape to contract.
   See below.
@@ -2721,12 +2721,12 @@ <h3 id="the-box-shadow">The 'box-shadow' property</h3>
 the shadow shape is rounded in the same way. The 'border-image' does not
 affect the shape of the box-shadow.
 
-<p>If a spread radius is defined, the shadow is expanded outward by an
-operation equivalent to applying the absolute value of the spread radius
-to a blur operation as defined below and thresholding the result such
-for a positive spread radius all non-transparent pixels are given the
-full shadow color and for a negative spread radius all non-opaque pixels
-are made transparent.
+<p>If a spread distance is defined, the shadow is expanded outward by
+an operation equivalent to applying the absolute value of the spread
+value as a blur operation as defined below and thresholding the result
+such that for a positive spread radius all non-transparent pixels are
+given the full shadow color and for a negative spread radius all
+non-opaque pixels are made transparent.
 The UA may approximate this operation by taking an outward outset of the
 specified amount normal to the original shadow perimeter. Alternatively
 the UA may approximate the transformed shadow perimeter shape by
@@ -2741,10 +2741,10 @@ <h3 id="the-box-shadow">The 'box-shadow' property</h3>
 floored at zero. (A zero-sized shadow shape would cause an outer shadow
 to disappear, and an inner shadow to cover the entire padding-box.)
 
-<p>A positive blur radius indicates that the resulting shadow should
+<p>A positive blur value indicates that the resulting shadow should
 be blurred, such as by a Gaussian filter. The exact algorithm is not
 defined; however for a long, straight shadow edge, this should create
-a color transition the length of the blur radius that is perpendicular
+a color transition the length of the blur distance that is perpendicular
 to and centered on the shadow's edge, and that ranges from the full
 shadow color at the radius endpoint inside the shadow to fully
 transparent at the endpoint outside it.