pacemaker
English
Noun
(en noun)(wikipedia)
One who sets the pace in a race, to guide the others.
(anatomy) A set of nerves which stimulate the heart to beat.
(hence, medicine) A medical implement that is used to stimulate a heart to beat by simulating the action of the natural pacemaker.
href
Not English
Href has no English definition. It may be misspelled. 