Pacemaker (Noun)
Meaning 1
An implanted electronic device that takes over the function of the natural cardiac pacemaker.
Classification
Nouns denoting man-made objects.
Synonyms
Meaning 2
A specialized bit of heart tissue that controls the heartbeat.
Classification
Nouns denoting body parts.
Synonyms
Hypernyms
Meaning 3
A horse used to set the pace in racing.
Classification
Nouns denoting animals.
Synonyms
Hypernyms
Meaning 4
A leading instance in its field; "the new policy will be a pacesetter in community relations".
Classification
Nouns denoting cognitive processes and contents.