Rubescent
ahd-5
adjective.
Turning red; reddening.
The Century Dictionary and Cyclopedia
Growing or becoming red; tending to a red color; blushing.
the GNU version of the Collaborative International Dictionary of English
adjective.
Growing or becoming red; tending to redness.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
turning
red
;
reddening