noun
refrigerator ship; reefer ship
A cargo ship equipped with refrigeration facilities for transporting perishable goods such as fruit, meat, or fish.
冷凍船で南米からバナナが運ばれてくる。
Bananas are shipped from South America by refrigerator ship.
冷蔵船 is a near-synonym also meaning 'refrigerated ship'; 冷凍船 may imply freezing capability, while 冷蔵船 often implies chilling/refrigeration.
Compound of 冷凍 (れいとう, 'freezing, refrigeration') and 船 (せん, 'ship, vessel').