plant egg cell PO:0020094 A gamete (PO:0025006) produced by an archegonium (PO:0025126) or an embryo sac (PO:0025074). egg cell (broad) The plant egg cell (megagamete) is usually larger than the plant sperm cell (PO:0000084; microgamete). plant_anatomy PO_GIT:140 植物卵細胞 (Japanese, exact) megagamete (exact) non-mobile gamete (broad) female gamete (exact) ooc&#233lula (Spanish, exact) plant gamete