"Port wine" refers to a type of sweet, fortified wine that comes from the Douro Valley in Portugal. It is typically red and has a higher alcohol content than regular wine. Full definition
She would respond with a laugh and describe how she would frequently consume two pounds of chocolate a week, drank generous amounts of port wine and became a smoker at age 21. (washingtonpost.com)
Much like laser treatment of spider veins, treating port wine stains with a laser causes selective destruction of the problematic vessels. (mamanatural.com)