Deliberately, though apparently accidentally.

Someone who believes in accidentalism. / An expert in accidents, especially those involving motor vehicles.

plural of accidentalist

(medicine) A spontaneous abortion.

plural of accidental abortion

(obsolete) accidental; occurring by chance; occasional / (obsolete) logically accidental; non-essential

plural of accidental light

(optics) A colour depending on the hypersensibility of the retina of the eye for complementary colours. They are purely subjective sensations of colour which often result from the contemplation of actually coloured bodies.

plural of accidental color

Alternative form of accidental colour