[gam-uh-gram] /ˈgæm əˌgræm/
a record of the intensity and distribution of radioactivity in tissue following the application of radioactive tracers; scintigram.
noun 1. Metallurgy. an allotrope of iron, stable between 910°C and 1400°C and having a face-centered cubic lattice. noun 1. an allotrope of iron that is nonmagnetic and exists between 910°C and 1400°C
- Gamma knife
noun 1. an machine that uses radiation with extreme accuracy to destroy abnormal tissue, esp in the brain noun a medical device using intersecting beams of gamma rays to treat brain tumors and lesions
noun, Physics. 1. a photon of penetrating electromagnetic radiation (gamma radiation) emitted from an atomic nucleus. 2. a photon emitted by an electron as a result of internal conversion. 3. electromagnetic radiation with wavelengths shorter than approximately one tenth of a nanometer. gamma ray n. Electromagnetic radiation emitted from the nucleus of an atom by […]
- Gamma-ray astronomy
[gam-uh-rey] /ˈgæm əˌreɪ/ noun 1. the branch of astronomy that deals with the study of celestial objects by means of the gamma rays that come from them. noun 1. the investigation of cosmic gamma rays, such as those from quasars