[a. F. extumescence, f. L. extumēscent-em, pr. pple. of extumēscĕre to begin to swell out, f. extumēre, f. ex- out + tumēre to swell.] A swelling out or up.
1611. Cotgr., Extumescence, an extumescence, a swelling, a rising vp.
1656–81. in Blount, Glossogr.
1721–1800. in Bailey.
1884. in Syd. Soc. Lex.
