subsidiary atrial pacemaker sub·sid·i·ar·y atrial pacemaker (səb-sĭd’ē-ěr’ē)
A secondary source for rhythmic control of the heart, available for controlling cardiac activity if the sinoatrial pacemaker fails.
noun 1. a condition of reduced potency, as of a medication. 2. a reduced capacity to transmit genetic characteristics.
- Sub-post office
noun 1. (in Britain) a post office run by a sub-postmaster or sub-postmistress as a self-employed agent for the Post Office
noun 1. the total number of persons inhabiting a country, city, or any district or area. 2. the body of inhabitants of a place: The population of the city opposes the addition of fluorides to the drinking water. 3. the number or body of inhabitants in a place belonging to a specific social, cultural, socioeconomic, […]
adjective 1. of or relating to the Pontine Marshes. adjective 1. of or relating to bridges 2. of or relating to the pons Varolii