| 释义 |
Definition of black heart in English: black heartnoun ˈblak ˌhɑːt 1Any of several cultivated varieties of sweet cherry producing dark-coloured fruit. 2Agriculture and Horticulture. Any of various plant diseases in which blackening of inner areas of plant tissue takes place; specifically a disease of potatoes characterized by a blackening at the centre of stored and growing tubers, caused by oxygen deprivation such as may result from temperature extremes, waterlogging, or poor ventilation. 3Metallurgy. A type of malleable cast iron containing nodules of graphite in a ferrite matrix. Contrasted with white heart.
Origin Mid 17th century; earliest use found in John Evelyn (1620–1706), diarist and writer. From black + heart. Definition of black heart in US English: black heartnounˈblak ˌhɑːt 1Any of several cultivated varieties of sweet cherry producing dark-coloured fruit. 2Agriculture and Horticulture. Any of various plant diseases in which blackening of inner areas of plant tissue takes place; specifically a disease of potatoes characterized by a blackening at the centre of stored and growing tubers, caused by oxygen deprivation such as may result from temperature extremes, waterlogging, or poor ventilation. 3Metallurgy. A type of malleable cast iron containing nodules of graphite in a ferrite matrix. Contrasted with white heart.
Origin Mid 17th century; earliest use found in John Evelyn (1620–1706), diarist and writer. From black + heart. |