(born Jan. 15, 1879, Newmarket, Ont., Can.—died July 12, 1961, Toronto) Canadian author. She is best known for a series of novels centred on the Whiteoak family of Jalna, an estate in her native Ontario. These sagas of the family's history, more popular in the U.S. and Europe than in Canada, were the basis of a film, Jalna (1935), and a play, Whiteoaks (1936). She also wrote children's stories, travel books, drama, and an autobiography.

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Minimum distance at which a large natural satellite can orbit its primary body without being torn apart by tidal forces. If satellite and primary are of similar composition, the theoretical limit is about 2.5 times the radius of the larger body. The rings of Saturn, for example, lie inside Saturn's Roche limit and may be the debris of a demolished moon. The limit was first calculated by the French astronomer Édouard Roche (1820–53) in 1850.

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(born Jan. 15, 1879, Newmarket, Ont., Can.—died July 12, 1961, Toronto) Canadian author. She is best known for a series of novels centred on the Whiteoak family of Jalna, an estate in her native Ontario. These sagas of the family's history, more popular in the U.S. and Europe than in Canada, were the basis of a film, Jalna (1935), and a play, Whiteoaks (1936). She also wrote children's stories, travel books, drama, and an autobiography.

Learn more about de la Roche, Mazo with a free trial on Britannica.com.

Business & companies

• Roche Applied Science, a business area of Roche Diagnostics, a division of Hoffmann–La Roche AG, Basel, Switzerland, one of the largest pharmaceutical companies in the world

Places

in France

• Roche, Isère, in the Isère département
• Roche, Loire, in the Loire département
• Roche-Charles-la-Mayrand, in the Puy-de-Dôme département
• Roche-d'Agoux, in the Puy-de-Dôme département
• Roche-en-Régnier, in the Haute-Loire département
• Roche-et-Raucourt, in the Haute-Saône département
• Roche-la-Molière, in the Loire département
• Roche-la-Peyroux, in the Corrèze département
• Roche-lès-Clerval, in the Doubs département
• Roche-lez-Beaupré, in the Doubs département
• Roche-Saint-Secret-Béconne in the Drôme département
• Roche-sur-Linotte-et-Sorans-les-Cordiers, in the Haute-Saône département
• La-Roche-Bernard, in the Morbihan département
• La-Roche-Blanche, Loire-Atlantique, in the Loire-Atlantique département
• La-Roche-Blanche, Puy-de-Dôme, in the Puy-de-Dôme département
• La-Roche-Canillac, in the Corrèze département
• La-Roche-Chalais, in the Dordogne département
• La-Roche-Clermault, in the Indre-et-Loire département
• La-Roche-de-Gluns, in the Drôme département
• La-Roche-de-Rame, in the Hautes-Alpes département
• La-Roche-Derrien, in the Côtes-d'Armor département
• La-Roche-des-Arnauds, in the Hautes-Alpes département
• La-Roche-des-Brenil, in the Côte-d'Or département
• La-Roche-Guyon, in the Val d'Oise département
• La-Roche-l'Abeille, in the Haute-Vienne département
• La-Roche-Mabile, in the Orne département
• La-Roche-Maurice, in the Finistère département
• La-Roche-Morey, in the Haute-Saône département
• La-Roche-Noire, in the Puy-de-Dôme département
• La-Roche-Posay, in the Vienne département
• La-Roche-Rigault, in the Vienne département
• La-Roche-sur-Foron, in the Haute-Savoie département
• La-Roche-sur-Grane, in the Drôme département
• La-Roche-sur-le-Buis, in the Drôme département
• La Roche-sur-Yon, in the Vendée département
• La-Roche-Vanneau, in the Côte-d'Or département
• La-Roche-Vineuse, in the Saône-et-Loire département
• Roches, Creuse, in the Creuse département
• Roches, Loir-et-Cher, in the Loir-et-Cher département
• Roches-Bettaincourt, in the Haute-Marne département
• Roches-lès-Blamont, in the Doubs département
• Roches-Prémarie-Andillé, in the Vienne département
• Roches-sur-Marne, in the Haute-Marne département
• Les Roches-de-Condrieu, in the Isère département
• Les Roches-l'Évêque, in the Loir-et-Cher département
• Clos de la Roche, grand cru vineyard in the Côte de Nuits

in Switzerland

• Roche, Vaud, in the Aigle district, canton of Vaud
• Roche d'Or, in the canton of Jura
• Roches, Switzerland, a village in the canton of Bern

in the United Kingdom

• Roche, Cornwall, a village in the Duchy of Cornwall

in Ireland

• Roche's Point, Co. Cork.
• Castletownroche, Co. Cork.

in the United States

• Roche de Bout, a rock formation in the Maumee River near the town of Waterville, Ohio

Further afield

• Roche (crater), a crater on the Moon.
• Rocheworld, a planet circling Barnard's Star in the novel of the same name by Robert L. Forward

People

• The Roches, a female vocal group of sisters (Maggie and Terre and Suzzy Roche)
• Saint Roch (also known as "Saint Roche" or "Saint Rocco"), patron saint of plague, pestilence and skin diseases
• Charlotte Roche, a German television presenter, actress, singer and author
• Danni Roche, an Australian field hockey player
• Dick Roche, an Irish politician
• Douglas Roche, O.C., peace activist and former Canadian Senator
• Édouard Roche, a French scientist
• Eric Roche, an Irish fingerstyle guitarist
• Frances Roche, wife of Sir Philip Miles, 2nd Baronet and daughter of Sir David Roche Roche Baronets
• Frank Roche, an American writer
• Gabriel Roche, former mayor of Courbevoie, having served from September 1944 to October 1947 and January 1955 to March 1959
• James G. Roche, 20th Secretary of the United States Air Force
• Joe Roche, American columnist from Minnesota and Iraq War veteran
• Karl Roche, German syndicalist
• Regina Marie Roche, an English Gothic Novelist
• Stephen Roche, an Irish cyclist and winner of the Triple Crown of Cycling
• Nicolas Roche, an Irish cyclist
• Tony Roche, Australian tennis player and coach
• Roche Braziliano, French buccaneer
• Roche Baronets, a Baronet of Great Britain
• William Roche (rugby player), Irish rugby union player

Science

• Roche limit (also known as the "Roche radius"), a concept in celestial mechanics
• Roche lobe, a concept in celestial mechanics
• Roche (spider), a spider genus in the family Ochyroceratidae