adjective
(botany, of leaves) With the outline of the margin more or less concave in places, usually at the apex.
(botany, mycology) Having roughly the same height or width for most of its length, becoming much shallower or narrower before reaching the attachment point.
(zoology, anatomy) Having a margin that has concave edges as though with parts removed or notched.
(mineralogy) Of a crystal: having edges or corners of the primitive form beveled, crossed by a face.
verb
(transitive) To take away the margin of.
(intransitive) To lose the margin.
To marginalize.