Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
heart muscle | Yes | No | No | No |
pacemaker | Yes | No | No | No |
heart muscle (noun) | pacemaker (noun) |
---|---|
the muscle tissue of the heart; adapted to continued rhythmic contraction | a horse used to set the pace in racing |
an implanted electronic device that takes over the function of the natural cardiac pacemaker | |
a specialized bit of heart tissue that controls the heartbeat | |
a leading instance in its field |