heart wheel

One form of cam-wheel, which acts by a regular impulse and rece ion to reciprocate the object against which it impinges. [HEART CAM.] heart-whole, a. 1. Having the heart or affections free or untouched; not affected by love. 2. With unbroken spirits or courage; undismayed. 3. Of a single or sincere heart. heart-wood, heartwood, 8. Bot., .: 'The central portion of the wood of exogens, which is also the oldest, and has had more time to harden than that more recently deposited. The same as DURAMEN (q. v.).