The phrase "small vessels" refers to tiny ships or boats. It means little watercraft that are used for travel or transportation, but are not very big. Full definition
I like to offer the a variety of sweet and savory spreads to accompany the cheese board — place them in small vessels with serving spoons. (anappealingplan.com)
It was found the mutations result in cerebral small vessel disease in patients as young as one year of age. (sciencedaily.com)
Officials will look at whether overnight hours can be done with smaller vessels that are cheaper to run. (silive.com)