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(ɪˌlu məˈnɒm ɪ tər)

an instrument for measuring illumination.
[1890–95; illumin (ation) + -o- + -meter]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The photonic activity resulting from the reactions between the reactive oxygen species, luminol, and lucigenin was recorded by using an illuminometer for 10 min, and the area-under-curve was calculated.
Apparatuses Items Specifications Camera Resolution 6000x4000 Sensor type (size) APS-C (23.2 x 15.4 mm) Illuminometer Receptor Silicon photocell Measuring range 0.01 to 299,900 lx; 0.001 to 29,990 fcd Lamp Power 1000 W/s Color temperature 3200[degrees]K Table 2: Illuminance level depending on distance.