font-size-adjust
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Description

This property allows authors to specify an aspect value for an element that will preserve the x-height of the first choice font in the substitute font.

Initial Value : none
Applies to : all elements
Inherited : yes
Possible Values 
<number> | none | inherit
Example(s) 
this property allows authors to specify an aspect value for an element that will preserve the x-height of the first choice font in the substitute font.
Previous- font-stretch  |  Next-text-shadow