The term 'dairy unit' is used to refer to the various components of a dairy farm. The crossword solutions for this term include 'ENTRY' (5 letters), 'COW' (3 letters), 'oleos' (5 letters), 'CREAM' (5 letters), and 'oleo' (4 letters). ENTRY refers to the entrance to the dairy farm, COW is the main animal used in dairy farming, oleos are a type of fat derived from vegetable oils, CREAM is a dairy product made from COW's milk, and oleo is another name for margarine.