(click for larger image in new window) adj. Having a shallow notch at the tip, as in some petals and leaves.
[Latin ēmarginātus, past participle of ēmargināre, to take the edge away : ē-, ex-, ex- + margō, margin-, margin; see merg- in Indo-European roots.] e·mar'gi·na'tion (-nā'shən) n.