'Herd's grass' definitions:

Definition of 'herd's grass'

noun

Grass with long cylindrical spikes grown in northern United States and Europe for hay [syn: timothy, herd's grass, Phleum pratense]

From: GCIDE

Herd \Herd\ (h[~e]rd), n. [OE. herd, heord, AS. heord; akin to OHG. herta, G. herde, Icel. hj["o]r[eth], Sw. hjord, Dan. hiord, Goth. ha['i]rda; cf. Skr. [,c]ardha troop, host.] [1913 Webster]
1. A number of beasts assembled together; as, a herd of horses, oxen, cattle, camels, elephants, deer, or swine; a particular stock or family of cattle. [1913 Webster]
The lowing herd wind slowly o'er the lea. --Gray. [1913 Webster]
Note: Herd is distinguished from flock, as being chiefly applied to the larger animals. A number of cattle, when driven to market, is called a drove. [1913 Webster]
2. A crowd of low people; a rabble. [1913 Webster]
But far more numerous was the herd of such Who think too little and who talk too much. --Dryden. [1913 Webster]
You can never interest the common herd in the abstract question. --Coleridge. [1913 Webster]
Herd's grass (Bot.), one of several species of grass, highly esteemed for hay. See under Grass. [1913 Webster]

From: GCIDE

Timothy \Tim"o*thy\, n., or Timothy grass \Tim"o*thy grass`\ [From Timothy Hanson, who carried the seed from New England to Maryland about 1720.] (Bot.) A kind of grass (Phleum pratense) with long cylindrical spikes; -- called also herd's grass, in England, cat's-tail grass, and meadow cat's-tail grass. It is much prized for fodder. See Illustration in Appendix. [1913 Webster]

From: GCIDE

Redtop \Red"top`\ (-t?p`), n. (Bot.) A kind of grass (Agrostis vulgaris) highly valued in the United States for pasturage and hay for cattle; -- called also English grass, and in some localities herd's grass. See Illustration in Appendix. The tall redtop is {Triodia seslerioides}. [1913 Webster]