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.
Common types of leaf edges include: entire which have a smooth edge; sinuate which have wavy curves; dentate which have little tooth-shaped notches; serate which have sharp, bent teeth like the blade of a saw; and lobed which have deep, rounded divisions that do not reach the center of the half-blade.