This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Resembling a vein or some aspect of one.

adj. having or showing markings that resemble veins

"From there, giant dams and pumps suck the water southward through veinlike aqueducts to 25 million people and more than 5 million acres of farmland."

patterned