Short-term obligations issued at a discount from face value. Discount notes have no periodic interest payments; the investor receives the note's face value at maturity. For example, a one-year, $1,000 face value discount note purchased at issue at a price of $950, would yield $50 or 5.26% ($50/$950).
Source: http://investor.gov/glossary/glossary_terms/discount-note#.Us2s82RDuEg