单词 | photopositive |
释义 | photopositive/ˌfəʊtəʊˈpɒzɪtɪv /adjective 1 Biology (Of an organism) tending to move towards light.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%....
2 Physics (Of a substance) exhibiting an increase in electrical conductivity under illumination.Most maskants are photopositive materials and are designed to operate at low pH and to be developed (or stripped) in high pH solvents....
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