white-heart
/ˈwʌɪthɑːt/adjective
1Of a cabbage or lettuce: having a whitish or very pale green heart.
2Originally US Metallurgy. Designating a type of malleable cast iron from which carbon has been removed by annealing at a high temperature in oxidizing conditions, leaving a structure of iron carbide in a metallic matrix.
- This type of malleable cast iron is produced by the Réaumur process, and is also called Réaumur malleable cast iron..
noun
1= white-heart cherry.
2Originally US. Whiteheart malleable cast iron.
Origin
Early 17th century (in an earlier sense). From white + heart.