accelerator fiber n.
Any of the postganglionic sympathetic nerve fibers that originate in the superior middle and inferior cervical ganglia of the sympathetic trunk and convey impulses to the heart that tend to increase the rapidity and force of the cardiac pulsations.
- Accelerator mass spectrometry
a type of mass spectrometry used in radiocarbon dating in which the proportion of carbon isotopes is counted directly, as contrasted with the indirect Geiger counter method, using an accelerator that drastically reduces the quantity of datable material required.
- Accelerator globulin
accelerator globulin accelerator globulin n. Variant of serum accelerator globulin.
not ; stemless; without visible stem. adjective (biology) having no stem adjective having no visible stem or a very short one
- Accelerator nerve
accelerator nerve accelerator nerve n. Any of the slender unmyelinated nerves establishing the sympathetic innervation of the heart, and originating from the ganglion cells of the superior, middle, and inferior cervical ganglion of the sympathetic trunk.