The term REF. WORK is a reference to the type of work done by people who compile and edit reference materials such as dictionaries, encyclopedias, and other works of reference. The crossword solutions for this term are ENC (3 letters), DICT (4 letters), OED (3 letters), ENCY (4 letters), and ENCYC (5 letters). These abbreviations stand for Encyclopedia, Dictionary, Oxford English Dictionary, Encyclopedia, and Encyclopedia respectively.