Definition of photopositive in English:

photopositive

Syllabification: pho·to·pos·i·tive
Pronunciation: /ˌfōtōˈpäzitiv
 
/

adjective

  • 1 Biology (Of an organism) tending to move toward light.
    More example sentences
    • The frequency of lethal and semilethal chromosomes in the photopositive population was 43%, and those for the photonegative and the unselected populations were 18% and 27%.
    • At higher temperatures D. pseudoobscura, D. simulans, and D. melanogaster become more photopositive, while D. ananassae and D. willistoni become less photopositive.
  • 2 Physics (Of a substance) exhibiting an increase in electrical conductivity under illumination.
    More example sentences
    • Most maskants are photopositive materials and are designed to operate at low pH and to be developed (or stripped) in high pH solvents.
    • When a photopositive material is used, the photosensitive material situated on the active sensor surface is exposed, while the remaining photosensitive material remains unexposed.

More definitions of photopositive

Definition of photopositive in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day maelstrom
Pronunciation: ˈmālˌsträm
noun
a powerful whirlpool in the sea