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transmittance

[trans-mit-ns, tranz-] /trænsˈmɪt ns, trænz-/
noun
1.
Physics. the ratio of the radiant flux transmitted through and emerging from a body to the total flux incident on it: equivalent to one minus the absorptance.
Also called transmission.
Origin
1850-1855
1850-55; transmit + -ance
Related forms
nontransmittance, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for transmittance
  • transmittance decreases with increasing turbidity and dissolved salts.
  • transmittance signals are taken directly from the spectrometer output electronics.
British Dictionary definitions for transmittance

transmittance

/trænzˈmɪtəns/
noun
1.
the act of transmitting
2.
(physics) Also called transmission factor. a measure of the ability of anything to transmit radiation, equal to the ratio of the transmitted flux to the incident flux; the reciprocal of the opacity. For a plate of material the ratio of the flux leaving the entry surface to that reaching the exit surface is the internal transmittance τ Compare reflectance, absorptance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for transmittance
n.

1855, from transmit + -ance.

Online Etymology Dictionary, © 2010 Douglas Harper
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