brown heart

noun

, Plant Pathology.

1. a brown discoloration of the flesh of stored apples, resulting from high concentrations of carbon dioxide.

Word History and Origins

Origin of brown heart¹

First recorded in 1920–25

Example Sentences

No; her little brown heart remained true to Charlie, though she necessarily gave him less of her society than before.

From Project Gutenberg

The other kind has white wood with a small brown heart, but nearly as hard as lignum vitae.

From Project Gutenberg