unhearted en · ADJ
Etymology
From un- + hearted.
Meanings
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(not-comparable) Having had the heart, or central portion, removed.
Formerly, during the winter months, unhearted French lettuces or "butterflies," grown under portable glass and consisting of only a few leaves, were marketed extensively in counts of 4 to 6 dozen.
1935, Economic Series, number 25, page 79: