'Panic grass' definitions:

Definition of 'panic grass'

(from WordNet)
noun
Any grass of the genus Panicum; grown for grain and fodder

Definition of 'Panic grass'

From: GCIDE
  • Panic \Pan"ic\, n. [L. panicum.] (Bot.) A plant of the genus Panicum; panic grass; also, the edible grain of some species of panic grass. [1913 Webster]
  • Panic grass (Bot.), any grass of the genus Panicum. [1913 Webster]