The crossword solutions for the term ORIGIN ABBR. are ESTD (4 letters) and DERIV (5 letters). ESTD stands for 'ESTABLISHED' and is used to refer to the founding of a business, organization, or other entity. DERIV stands for 'DERIVATION' and is used to refer to something that has been derived from another source, such as a word or phrase. Both terms are abbreviations commonly used in crosswords and other puzzles.