Tanker

A tanker is a limited-role starship with the primary function of transporting large quantities of fuel and other liquid-state items. Loads can include deuterium, anti-deuterium and antimatter waste.

The starship served as a tanker, refuelling other Starfleet starships in at least the 23rd century. (Starship Recognition Files 2)

The starship was an antimatter tanker developed by Starfleet in the 2370s. USS Ragronok (NCC-74134) was a ship of this class. (Trekker's Alternity Galactopedia)

In 2379, the USS Dauntless (NCC-75310) and a neutronic fuel tanker collided ner New Gibraltar. (Star Trek: Dauntless)

The runabout USS Willamette (NCC-73654) served as a tanker for fighters in 2380. (Star Trek: New Order)