May blob mayb·lob uncommon noun 1. swamp plant of Europe and North America having bright yellow flowers resembling buttercups Synonymsmarsh marigoldkingcupmeadow brightMay blobcowslipwater dragonCaltha palustris Related words Broader terms marsh plant Parts Caltha WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
