A property which is not essential; a nonessential; anything happening accidentally.
Those fortuitous effects produced by luminous rays falling on certain objects so that some parts stand forth in abnormal brightness and other parts are cast into a deep shadow.
A sharp, flat, or natural, occurring not at the commencement of a piece of music as the signature, but before a particular note.
Part of a text that has a mainly structural purpose, such as spelling, punctuation or capitalization.
Not essential; incidental, secondary.
Nonessential to something's inherent nature (especially in Aristotelian thought).
Adjusted by one or two semitones, in temporary departure from the key signature.
Occurring sometimes, by chance; occasional.
Happening by chance, or unexpectedly; taking place not according to the usual course of things; by accident, unintentional.
Being a double point with two distinct tangent planes in 4-dimensional projective space.