megacandela

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noun

An SI unit of luminous intensity equal to 10⁶ candelas. Symbol: Mcd

Scrabble 17
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Meanings

nounmegacandela (plural megacandelas)

plural megacandelas

  1. metrologyAn SI unit of luminous intensity equal to 10⁶ candelas. Symbol: Mcd

    Under clear sky conditions the luminance of the sun itself is around 1650 Mcd/m² (megacandela/m²)[.]

    1980, S. V. Szokolay, Environmental science handbook for architects and builders, page 99
    2 more examples

    Searchlights utilized in helicopter operations range in size from a 450-watt, 0.4 megacandela unit using a type PAR-46 incandescent lamp (see Fig 20-3) up to a 30-kilowatt, xenon-lamped unit[.]

    1987, John E. Kaufman, Jack F. Christensen, IES Lighting Handbook: Application volume, →ISBN

    The light-emitting capacity of an LED is measured in megacandela [recte millicandelas] or mcd. Small commercial LEDs range from 10 to about 5000 mcd.

    2012, Julio Sanchez, Maria P. Canton, Embedded Systems Circuits and Programming, →ISBN, page 12

Origin

From mega- + candela.

Full word history & related roots →
Cite this entry
APA

megacandela. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/megacandela

MLA

“megacandela.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/megacandela. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “megacandela,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/megacandela.

Source: megacandela on Wiktionary, CC BY-SA 4.0.