radio.html - {n. phr.} Someone whose hobby is the operating of shortwave radio. * /The code letters C.Q. are used by radio hams to invite other radio hams to join in the conversation./

radio.html - n. & v.
--n.

(pl. -os)
1 (often attrib.) a the transmission and reception of sound messages etc. by electromagnetic waves of radio-frequency (cf. WIRELESS). b an apparatus for receiving, broadcasting, or transmitting radio signals. c a message sent or received by radio.
2 a sound broadcasting in general (prefers the radio). b a broadcasting station or channel (Radio One).

--v.

(-oes, -oed)
1 tr. a send (a message) by radio. b send a message to (a person) by radio.
2 intr. communicate or broadcast by radio.

radio astronomy the branch of astronomy concerned with the radio-frequency range of the electromagnetic spectrum. radio cab (or car) a cab or car equipped with a two-way radio. radio fix the position of an aircraft, ship, etc., found by radio. radio galaxy a galaxy emitting radiation in the radio-frequency range of the electromagnetic spectrum. radio ham see HAM . radio star a small star etc. emitting strong radio waves. radio telescope a directional aerial system for collecting and analysing radiation in the radio-frequency range from stars etc. [short for radio-telegraphy etc.]

radio.html - comb. form 1 denoting radio or broadcasting.
2 a connected with radioactivity. b denoting artificially prepared radioisotopes of elements (radio-caesium).
3 connected with rays or radiation.
4 Anat. belonging to the radius in conjunction with some other part (radio-carpal). [RADIUS + -O- or f. RADIO]

radio.html - n.
an analysis of a substance based on radiation from a sample.

radio.html - adj.
(of a model aircraft etc.) controlled from a distance by radio.

radio.html - n.
a natural or artificial radioactive element or isotope.