fleabane has definitions from the field of botany
[ noun ] (botany) any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas
[ noun ] (botany) hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas

Related terms

herb Pulicaria

[ noun ] (botany) common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron

Related terms

weed Conyza