ring spot
noun Plant Pathology.
any of various plant diseases caused by a virus or fungus and characterized by concentric rings of discoloration or necrosis on the leaves.
Origin of ring spot
First recorded in 1905–10
Words nearby ring spot
ring rot,
ring scotoma,
ring shout,
ring snake,
ring spinning,
ring spot,
ring stone,
ring syringe,
ring taw,
ring the changes,
ring true
Example sentences from the Web for ring spot
In this way the first ring-spot probably arose in some species on only one—the penultimate segment.
Studies in the Theory of Descent (Volumes 1 and 2) |August WeismannThe formation of the second ring-spot sometimes takes place in the present stage (Fig. 42).
Studies in the Theory of Descent (Volumes 1 and 2) |August WeismannAt a later period these two222 crescents and also the two primary nuclei coalesce, producing a ring-spot which, as in Fig. 61, Pl.
Studies in the Theory of Descent (Volumes 1 and 2) |August WeismannOn the first segment only there is210 no spot, and here no ring-spot is afterwards formed.
Studies in the Theory of Descent (Volumes 1 and 2) |August Weismann