'mad-dog weed' definitions:

Definition of 'mad-dog weed'

(from WordNet)
noun
An American mint that yields a resinous exudate used especially formerly as an antispasmodic [syn: blue pimpernel, blue skullcap, mad-dog skullcap, mad-dog weed, Scutellaria lateriflora]

Definition of 'mad-dog weed'

From: GCIDE
  • mad-dog skullcap \mad-dog skullcap\, mad-dog weed \mad-dog weed\n. (Bot.) An American mint (Scutellaria lateriflora) that yields a resinous exudate used esp. formerly as an antispasmodic.
  • Syn: blue pimpernel, blue skullcap, {Scutellaria lateriflora}. [WordNet 1.5]