/luy"sis/ , n.
1. Immunol. , Biochem. the dissolution or destruction of cells by lysins.
2. Med. the gradual recession of a disease. Cf. crisis (def. 4).
[ 1815-25; lýsis a loosening, releasing, equiv. to ly-, var. s. of lý ( ein ) to loosen, release + -sis -SIS ]