From
American Heritage Dictionary of the English Language, 5th Edition
Unknown. Possibly related to tusk, or Scottish Gaelic dosag (“little tuft").
From
Wiktionary
Tussock Sentence Examples
The nest, under a tussock of grass or a stone, is constructed of short dry straws, and usually lined with hair.
West of the dividing crest they are forest clad; east thereof their stony grimness is but slightly softened by growths of scrub and tussock grass.
The " tussock grass " is a wonderful and most valuable natural production, which, owing to the introduction of stock, has become extinct in the two main islands, but still flourishes elsewhere in the group. It is a reed-like grass, which grows in dense tufts from 6 to 10 ft.
Mountain tops are either rocky, bare or carpeted with tussock grass, above a belt of dense shady Holm Oak forest.
Tall tussock grassland provides the tallest vegetation cover on the island, there being no trees or tall shrubs.