n. [ L. radius radius + -meter: cf. F. radiomètre. ] 1. (Naut.) A forestaff. [ 1913 Webster ]
2. (Physics) An instrument designed for measuring the mechanical effect of radiant energy. [ 1913 Webster ]
☞ It consists of a number of light disks, blackened on one side, placed at the ends of extended arms, supported on a pivot in an exhausted glass vessel. When exposed to rays of light or heat, the arms rotate. [ 1913 Webster ]
n. [ L. radius radius + -meter: cf. F. radiomètre. ] 1. (Naut.) A forestaff. [ 1913 Webster ]
2. (Physics) An instrument designed for measuring the mechanical effect of radiant energy. [ 1913 Webster ]
☞ It consists of a number of light disks, blackened on one side, placed at the ends of extended arms, supported on a pivot in an exhausted glass vessel. When exposed to rays of light or heat, the arms rotate. [ 1913 Webster ]
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เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
High school=โรงเรียนมัธยมปลาย