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| radiation in the form of elementary particles emitted by an atomic nucleus produced by decay of radioactive substances or by nuclear fission |
| of or pertaining to the molecular force within a body or substance acting to unite its parts |
| frame of reference | |
| —n | |
| 1. | a set of basic assumptions or standards that determines and sanctions behaviour |
| 2. | any set of planes or curves, such as the three coordinate axes, used to locate or measure movement of a point in space |
| frame of reference (frām) Pronunciation Key
See reference frame. |