fourth heart sound n.
The heart sound occurring in late diastole, corresponding with atrial contraction.
noun 1. a loose federation of small groups of radical socialists formed in 1936 under the leadership of Leon Trotsky and hostile to the Soviet Union. Compare (def 6). noun 1. another name for Trotskyist International
[fawrth-lee, fohrth-] /ˈfɔrθ li, ˈfoʊrθ-/ adverb 1. in the place; .
- Fourth normal form
noun 1. . noun 1. the Fourth of July, a holiday in the United States, traditionally celebrated with fireworks: the day of the adoption of the Declaration of Independence in 1776 Official name Independence Day The day on which the Declaration of Independence was adopted by the Continental Congress in 1776; Independence Day.