abscessĭo, ōnis, f. [abscedo],
a going away , a separating : cum ad corpora tum accessio fieret, tum abscessio, i.e. diminution , * Cic. Univ. 12; Dict. Cret. B. Tr. 1, 5.
abscessiō ōnis, f diminution (once), C. ...
An Elementary Latin Dictionary