Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A device that measures the intensity of radiant energy, consisting of a partially evacuated glass bulb containing lightweight vertical vanes, each blackened on one side, suspended radially about a central vertical axis to permit their revolution about the axis as a result of incident radiation.
  • n. An instrument that detects electromagnetic radiation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A device that measures radiant energy.

from the GNU version of the Collaborative International Dictionary of English

  • n. A forestaff.
  • n. An instrument designed for measuring the mechanical effect of radiant energy.

from The Century Dictionary and Cyclopedia

  • n. An old instrument for measuring angles; the cross-staff.
  • n. An instrument which serves to transform radiant energy into mechanical work.
  • n. An instrument for the detection and measurement of small amounts of radiant energy.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. meter to detect and measure radiant energy (electromagnetic or acoustic)

Etymologies

radio- + -meter (Wiktionary)

Examples

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