11-letter words starting with pho
- photosphere — a sphere of light or radiance.
- photostated — a camera for making facsimile copies of documents, drawings, etc., in the form of paper negatives on which the positions of lines, objects, etc., in the originals are maintained.
- photostatic — a camera for making facsimile copies of documents, drawings, etc., in the form of paper negatives on which the positions of lines, objects, etc., in the originals are maintained.
- photosystem — either of two pigment-containing systems, photosystem I or II, in which the light-dependent chemical reactions of photosynthesis occur in the chloroplasts of plants
- phototactic — movement of an organism toward or away from a source of light.
- phototropic — growing toward or away from the light.