The term FOOTNOTE ABBR. refers to abbreviations commonly used in footnotes. IBID (4 letters) is an abbreviation for the Latin phrase 'ibidem, ' meaning 'in the same place.' IDEM (4 letters) is an abbreviation for the Latin phrase 'IDEM, ' meaning 'the same.' W (1 letter) is an abbreviation for 'WITH.' LOC (3 letters) is an abbreviation for 'loco citato, ' meaning 'in the place cited.' NES (3 letters) is an abbreviation for 'not elsewhere specified.' PGS (3 letters) is an abbreviation for 'PAGES.' ETAL (4 letters) is an abbreviation for 'et alii, ' meaning 'and others.' OPIT (4 letters) is an abbreviation for 'op. cit., ' meaning 'in the work cited.' ETSEQ (5 letters) is an abbreviation for 'et sequentes, ' meaning 'and the following.' OPCIT (5 letters) is an abbreviation for 'op. cit., ' meaning 'in the work cited.'