transmittance

C2+ Topic:Numbers & Quantity

US /trænsˈmɪtəns/ UK /trænzˈmɪtəns/ See IPA manual

noun

Meanings

1

noun
the fraction of light or radiation that passes through a medium

The filter's low transmittance blocked most of the ultraviolet light.

Thesaurus

Synonyms

1 noun · the fraction of light or... transmissiontransmissivity

Opposites

absorbancereflectance

Word family

Related forms transmit transmittal transmission

Etymology

From transmit + -ance; transmit is from Latin trānsmittere ('to send across'), from trāns ('across') + mittere ('to send').

trānsmittere Latin trāns Latin mittere Latin

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Topics

Numbers & Quantity

# transmittance

**Type:** Word
**Level:** C2+
**Part of speech:** noun
**IPA (US):** trænsˈmɪtəns
**IPA (UK):** trænzˈmɪtəns

## Meanings
1. the fraction of light or radiation that passes through a medium

## Examples
- The filter's low transmittance blocked most of the ultraviolet light.

## Synonyms
- transmission
- transmissivity

## Antonyms
- absorbance
- reflectance

## Related Forms
- transmit
- transmittal
- transmission

## Roots and Affixes
- Root: trānsmittere
- Root: trāns
- Root: mittere

## Etymology
From transmit + -ance; transmit is from Latin trānsmittere ('to send across'), from trāns ('across') + mittere ('to send').

## AI Etymology
Transmittance is from transmit + -ance; transmit is from Latin trānsmittere ('to send across'), from trāns ('across') + mittere ('to send'). Important recorded forms include trānsmittere (Latin), trāns (Latin), and mittere (Latin). Morphologically, the trans- element contributes the sense of across, through, beyond, or change from one state into another. The modern sense is largely compositional, with the historical elements narrowing into a stable English lexical item. In current use it covers the fraction of light or radiation that passes through a medium. The wider family includes related words such as transmit, transmittal, and transmission.

## Topics
- Numbers & Quantity

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