any of several Eurasian ranunculaceous plants of the genus Ranunculus, such as R. flammula (lesser spearwort) and R. lingua (great spearwort), which grow in wet places and have long narrow leaves and yellow flowers
See also buttercup
Examples of 'spearwort' in a sentence
spearwort
Dragonflies hover over pink, ragged robin flowers and golden-yellow lesser spearwort.