noun.
One of the swellings produced in the leaves and stems of plants by Cystopus, Synchytrium, and other fungi.
noun.
In medicine, a small inflammatory tumor containing pus; a small pimple containing pus.
noun.
In botany, a slight elevation like a pimple or little blister.
noun.
In zoology: A small rounded elevation of surface, like a blister; a papule or pimple.
noun.
A spot of color larger than a dot, and suggestive of a blister.