The Test. Tests for Epstein-Barr virus (EBV) antibodies are used to help diagnose infectious mononucleosis (mono) if a person is symptomatic but has a negative mono test.he Test. Tests for Epstein-Barr virus (EBV) antibodies are used to help diagnose infectious mononucleosis (mono) if a person is symptomatic but has a negative mono test.
leaf scar. (botany). A mark on a stem, formed by secretion of suberin and a gumlike substance, showing where a leaf has abscised. 1  Facebook. 2  Twitter.
Definition of LEAF for Kids. 1. : one of the usually flat green parts that grow from a plant stem and that functions mainly in making food by photosynthesis. 2. 3. : a single sheet of a book containing a page on each side.4.: a part that can be added to or removed from a table top. â leafÂ·less \ËlÄf-lÉs\ adjective. one of the flat and typically green parts of a plant that grow from a stem or twig. : a sheet of paper in a book. : a part that can be added to or removed from a table to change the size of its top surface.