Technology / Home Audio / Radio Frequency (Rf): An alternating current or voltage with a frequency (or carrier wave) above about 100khz. It's called radio frequency because these frequencies have a capacity to be radiated as electromagnetic waves by radio ( and television) stations.
Radio Adjective Synonyms: receiver, portable (radio), crystal set, wireless, transistor, ghetto-blaster, tranny or trannie, boom box
Radio Noun Synonyms: transmit, broadcast, air, disseminate, announce, present
Science / Biology / Radioisotope: Term applied to a radioactive isotope, such as carbon-14 or uranium 238. Radioisotope nuclei are unstable and spontaneously breakdown and emit one of a number of types of radiation. MORE
Entertainment / Photography / Radiography: Technique of using x-rays, gamma rays and charged particles to form shadow images on photographic materials. Used in medical and industrial research because of its ability to penetrate opaque objects. MORE
Science / Marine Biology / Radiocarbon Technique: The estimation of primary productivity by the measurement of radiocarbon uptake MORE
Science / Marine Biology / Radiolaria: Protistan phylum, whose members are planktonic and secrete an often elaborate siliceous test MORE
Science / Geology / Radiolarian: A group of one-celled marine animals with a siliceous skeleton that occupies shallow portions of the water column. Radiolarians have a range from Cambrian to present. MORE