Definition of "amb"

amb

noun
plural ambs
1. (palynology) The outline of a spore or pollen grain, as seen in a polar view.
  Quotations
  This genus is distinguished from Duplopollis Krutzsch, 1959a, and Cupanieidites Cookson and Pike, 1954, by being syncolpate rather than syncolporate and by the islands at the angles of the amb.
  1970, Robert Max Kosanke, editor, Symposium on Palynology of the Late Cretaceous and Early Tertiary