Definition of dog fennel in US English:

dog fennel

(also dog's fennel)

noun

  • Originally: the stinking chamomile, Anthemis cotula (family Asteraceae (Compositae)). Later also (chiefly North American): any of various similar plants of the same family having finely divided foliage resembling that of fennel, especially any of the genus Eupatorium.

Origin

Late Middle English. In some forms from dog + fennel; in some forms from the genitive of dog + fennel; so called on account of its bad smell, and fennel-like leaves; compare dog.

Pronunciation

dog fennel

/ˈdɒɡ ˌfɛnl/