yellowtop

noun

1

a

: any of several goldenrods

especially : early goldenrod

—sometimes plural but singular in construction

b

: bitter clover

c

: golden crownbeard

2

: any of several plant diseases characterized by yellowing of the upper foliage: such as

a

: a disease of alfalfa of undetermined cause characterized by a pronounced yellowing of the upper portions of affected plants

b

: a yellowing of alfalfa tops caused by the punctures of the potato leafhopper

Word History

Etymology

yellow entry 1 + top

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