a small white post beside a railway line at a point where the gradient changes having arms set at angles representing the gradients
[wind] /wɪnd/ noun 1. a wind with a velocity and direction that are mathematically defined by the balanced relationship of the pressure gradient force to the centrifugal force and the Coriolis force: conceived as blowing parallel to isobars.
[grey-din; French gra-dan] /ˈgreɪ dɪn; French graˈdɛ̃/ noun, plural gradins [grey-dinz; French gra-dan] /ˈgreɪ dɪnz; French graˈdɛ̃/ (Show IPA) 1. one of a series of steps or seats raised one above another. 2. Ecclesiastical. a shelf or one of a series of shelves behind and above an altar. /ˈɡreɪdɪn/ noun 1. a ledge above or […]
[greyd] /greɪd/ noun 1. a degree or step in a scale, as of rank, advancement, quality, value, or intensity: the best grade of paper. 2. a class of persons or things of the same relative rank, quality, etc. 3. a step or stage in a course or process. 4. a single division of a school […]
[grey-dee-om-i-ter] /ˌgreɪ diˈɒm ɪ tər/ noun, Physics. 1. any instrument used to measure a , as the rate of change of the geomagnetic field. Compare (def 3a). /ˌɡrædɪˈɒmɪtə/ noun 1. (physics) an instrument for measuring the gradient of a magnetic field 2. (surveying) an instrument used to ensure that a long gradient remains constant