Girasol definition, an opal that reflects light in a bright luminous glow. See more.
Pheophytin or phaeophytin (abbreviated Pheo) is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem II (PS II) in plants, and the photosynthetic reaction center (RC P870) found in purple bacteria.
1 The diploid stage of a plant (2n), the sporophyte, bears a sporangium, an organ that produces spores during meiosis.  Homosporous plants produce one type of spore which develops into a gametophyte (1n) with both male and female organs.