In Botany, of a fruit egg-shaped An early form of Sonar from an acronym A Measure of the time taken for radioactivity of given a sample to fall by 50% Iranian sect practising a modern version of...
In Radio & tv overlapping change of sound or picture County in East Wales formed in 1974 In showjumping a test of the horse's ability to jump Substances derived from petrochemicals, some of which are...