emarginate
adjective
emar·gin·ate (ˌ)ē-ˈmär-jə-nət 
-ˌnāt
: having the margin notched
emargination
(ˌ)ē-ˌmär-jə-ˈnā-shən
noun 
Word History
Etymology
Latin emarginatus, past participle of emarginare to deprive of a margin, from e- + margin-, margo margin
First Known Use
1794, in the meaning defined above