Definition of photopositive in English:

photopositive

adjective ˌfəʊtəʊˈpɒzɪtɪvˌfōdōˈpäzədiv

1Biology
(of an organism) tending to move towards light.
〔生〕（生物体）趋光的
Example sentencesExamples
- 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.
2Physics
(of a substance) exhibiting an increase in electrical conductivity under illumination.
〔物理〕（物质）正趋光性的，正光电导的
Example sentencesExamples
- 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.

Definition of photopositive in US English:

photopositive

adjectiveˌfōdōˈpäzədiv

1Biology
(of an organism) tending to move toward light.
〔生〕（生物体）趋光的
Example sentencesExamples
- At higher temperatures D. pseudoobscura, D. simulans, and D. melanogaster become more photopositive, while D. ananassae and D. willistoni become less photopositive.
- 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%.
2Physics
(of a substance) exhibiting an increase in electrical conductivity under illumination.
〔物理〕（物质）正趋光性的，正光电导的
Example sentencesExamples
- 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.

单词	photopositive
释义	Definition of photopositive in English: photopositive adjective ˌfəʊtəʊˈpɒzɪtɪvˌfōdōˈpäzədiv 1Biology (of an organism) tending to move towards light. 〔生〕（生物体）趋光的 Example sentencesExamples 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. 2Physics (of a substance) exhibiting an increase in electrical conductivity under illumination. 〔物理〕（物质）正趋光性的，正光电导的 Example sentencesExamples 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. Definition of photopositive in US English: photopositive adjectiveˌfōdōˈpäzədiv 1Biology (of an organism) tending to move toward light. 〔生〕（生物体）趋光的 Example sentencesExamples At higher temperatures D. pseudoobscura, D. simulans, and D. melanogaster become more photopositive, while D. ananassae and D. willistoni become less photopositive. 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%. 2Physics (of a substance) exhibiting an increase in electrical conductivity under illumination. 〔物理〕（物质）正趋光性的，正光电导的 Example sentencesExamples 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.
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