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2 definitions found
 for Rad
From The Collaborative International Dictionary of English v.0.48 :

  Rad \Rad\ (r[a^]d), n. [radiation absorbed dose.]
     A unit of measurement of the amount of ionizing radiation
     absorbed by an object, equal to an energy of 100 ergs per
     gram of irradiated material (equal to 0.01 gray).
     [PJC]

From The Collaborative International Dictionary of English v.0.48 :

  Rad \Rad\ (r[a^]d), obs.
     imp. & p. p. of Read, Rede. --Spenser.
     [1913 Webster]

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