Jean Bernard Leon Foucault
— Noun
– English
～ French physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyroscope (1819-1868)
James Leonard Farmer
— Noun
– English
～ United States civil rights leader who in 1942 founded the Congress of Racial Equality (born in 1920)
Juncus leseurii
— Noun
– English
～ rush of the Pacific coast of North America
Jerry Lee Lewis
— Noun
– English
～ United States rock star singer and pianist (born in 1935)
John L. Lewis
— Noun
– English
～ United States labor leader who was president of the United Mine Workers of America from 1920 to 1960 and president of the Congress of Industrial Organizations from 1935 to 1940 (1880-1969)
Jakob Liebmann Beer
— Noun
– English
～ German composer of operas in a style that influenced Richard Wagner (1791-1864)
judgment lien
— Noun
– English
～ lien on a debtor's property that is granted to a creditor by court judgment; lien may be enforced by having the sheriff seize the property and hold a sheriff's sale
Japanese lilac
— Noun
– English
～ lilac of northern China having ovate leaves and profuse early summer rose-lilac flowers
Jersey Lillie
— Noun
– English
～ British actress and mistress of the prince who later became Edward VII (1853-1929)
Jacobean lily
— Noun
– English
～ Mexican bulbous herb cultivated for its handsome bright red solitary flower
Japanese lime
— Noun
– English
～ medium-sized tree of Japan used as an ornamental
Jenny Lind
— Noun
– English
～ Swedish soprano who toured the United States under the management of P. T. Barnum (1820-1887)
Japanese linden
— Noun
– English
～ medium-sized tree of Japan used as an ornamental
Jacques Lipchitz
— Noun
– English
～ United States sculptor (born in Lithuania) who pioneered cubist sculpture (1891-1973)
Joseph Lister
— Noun
– English
～ English surgeon who was the first to use antiseptics (1827-1912)
John Llewelly Lewis
— Noun
– English
～ United States labor leader who was president of the United Mine Workers of America from 1920 to 1960 and president of the Congress of Industrial Organizations from 1935 to 1940 (1880-1969)
John Locke
— Noun
– English
～ English empiricist philosopher who believed that all knowledge is derived from sensory experience (1632-1704)
Jacques Loeb
— Noun
– English
～ United States physiologist (born in Germany) who did research on parthenogenesis (1859-1924)
Jack London
— Noun
– English
～ United States writer of novels based on experiences in the Klondike gold rush (1876-1916)