the GNU version of the Collaborative International Dictionary of English
adj. In the form of tendrils; -- applied especially to the spermatic and ovarian veins.
The Century Dictionary and Cyclopedia
Tendril-like; resembling tendrils.
Word Usage
"The veins emerge from the hilum in the form of a plexus, the pampiniform plexus; the ovarian vein is formed from this plexus, and leaves the pelvis in company with the artery."