The Collaborative International Dictionary
To crop up
Crop \Crop\, v. i. To yield harvest. To crop out.
(Geol.) To appear above the surface, as a seam or vein, or inclined bed, as of coal.
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To come to light; to be manifest; to appear; as, the peculiarities of an author crop out.
To crop up, to sprout; to spring up; to appear suddenly. ``Cares crop up in villas.``
--Beaconsfield.