Rubescent

from The Collaborative International Dictionary of English v.0.48

Rubescent \Ru*bes"cent\, a. [L. rubescens, -entis, p. pr. of
   rubescere to grow red, v. incho from rubere to be red: cf. F.
   rubescent. See {Ruby}.]
   Growing or becoming red; tending to redness.
   [1913 Webster]