brown heart

American  

noun

Plant Pathology.

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

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Etymology

Origin of brown heart

First recorded in 1920–25

Example Sentences

If you’ve been waiting to express yourself with a brown heart, this will be the year your wait comes to an end.

From The Verge

Many of these candidates add additional variations to existing emoji, such as options for a white or brown heart or a variety of colors for circular or square icons.

From The Verge

Pores of spring wood form a broad band of several rows; easy splitting, dark brown heart.

From Project Gutenberg

Heart muscle fibres turn dark brown, heart valves stretch like old rubber tubes, lose their youthful elasticity.

From Time Magazine Archive

There are also endless varieties of cistus, from the small yellow annual with rich brown heart to the large gum cistus that covers so much of the poor soil in the Alemtejo.

From Project Gutenberg