The term BOITO OPERA refers to the operas composed by Arrigo Boito, an Italian poet and composer. The crossword solutions for this term are NERO (4 letters), TOSCA (5 letters), NEROS (5 letters), BASSI (5 letters), BASSO (5 letters), OTELLO (6 letters), AIDA (4 letters), and SCALA (5 letters). These operas include 'Nero', 'Tosca', 'Nerone', 'Bassi', 'BASSO', 'Otello', 'AIDA', and 'Scala'. Boito's works are known for their complex musical structures and intricate librettos.