The Collaborative International Dictionary of English v.0.48:

Venose \Ve*nose"\, a. [See Venous.]
   Having numerous or conspicuous veins; veiny; as, a venose
   frond.
   [1913 Webster]

WordNet (r) 3.0 (2006):

venose
    adj 1: having or showing markings that resemble veins [syn:
           veined, venose, veinlike]