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mesopic

mesopic

9.9
Light that is between bright day and darkness, like at dawn or dusk
  • adjective
  • /mɛˈsɒpɪk/
  • Specialized
translation icon : mesópico
  • Birds are often active during mesopic periods, taking advantage of the low light to find food before full nightfall.
  • mesopic lighting conditions

Examples

  • On the first day, all the participants completed a mobility test that included two walks on different obstacle courses, one under photopic and one under mesopic conditions.

    Academic text (2010)
  • The trained group made significantly fewer contacts with obstacles in W2 than in W1 under mesopic illumination conditions, while the untrained group did not.

    Academic text (2010)
  • A significant reduction in contacts with obstacles under mesopic conditions was found in individuals who received search training.

    Academic text (2010)
  • Although our results suggest a transfer of effect from the low-level search task to the complex mobility task, the observed mobility enhancement was modest and occurred only under the mesopic lighting condition.

    Academic text (2010)
  • What we did find was that in the more challenging mesopic lighting conditions, the trained group made significantly fewer contacts with obstacles in W2 than in W1, while the untrained group did not.

    Academic text (2010)
  • Under the mesopic (poorly lit) condition, the average floor luminance was 3.4 cd/m².

    Academic text (2010)
  • At dusk, the park is treated as a mesopic environment where both daylight and darkness blend together.

  • Driving at dawn requires careful attention, as the mesopic light levels between day and night can obscure hazards.

Synonyms

semidark
vsmesopic
5.1

Partly dark with only a little light

refers to a specific middle light level between bright day and complete darkness

Antonyms

1.0

With little or no light and not bright

459 1.0

Full of strong light that makes a place easy to see

How Bright

photopic
  • Specialized
8.6
mesopic
  • Specialized
9.9
dim
62 1.0
dark
1.0

Surface Forms

mesopic positive

Morphology

mesopic = optic (semi-transparent) = meso + opic

The prefix 'meso-' (middle) combined with the vision-related stem yields the technical meaning, but the combining forms and slight spelling change make it not fully transparent to general learners.

Etymology

The word mesopic comes from Greek parts meso- meaning 'middle' and -opic from ops meaning 'eye', the same idea you see in optic. So mesopic describes the 'middle' light between bright day and dark night, like at dawn or dusk.