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Heart.

1. The interior, as of wood. The solid portion divested of sap-wood or alburnum.

2. The central solid portion or core of a twisted column.


3. (Nautical.) a. A dead-eye of triangular shape, having but one eye, whose lower edge has scores for the lanyard which hauls taut the backstay occupying the outside groove.

Hearts.

Collar-hearts are open at the lower ends; a double score is cut round the outside, and two grooves on each side for the seizing, which keeps the collar in the scores of the heart.

b. The inner part of a shroud-laid rope.

4. A heart-shaped wheel or cam used for converting a rotary into a reciprocating motion. See heart-cam.

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