accidental
     adj 1: associated by chance and not an integral part; "poetry is
            something to which words are the accidental, not by
            any means the essential form"- Frederick W. Robertson;
            "they had to decide whether his misconduct was
            adventitious or the result of a flaw in his character"
            [syn: {adventitious}]
     2: occurring or appearing or singled out by chance; "their
        accidental meeting led to a renewal of their friendship";
        "seek help from casual passers-by"; "a casual meeting"; "a
        chance occurrence" [syn: {casual}, {chance(a)}]
     3: without intention (especially resulting from heedless
        action); "with an inadvertent gesture she swept the vase
        off the table"; "accidental poisoning"; "an accidental
        shooting" [syn: {inadvertent}]
     n : a musical notation that makes a note sharp or flat or
         natural although that is not part of the key signature
Source: WordNet® 2.0