polar body, polar nucleus
polar body, polar nucleusor
polocytea small haploid cell, produced during OOGENESIS in female animals, that does not develop into a functional OVUM. During such GAMETOGENESIS, two (or sometimes three) polar bodies are produced, along with one large ovum. A similar situation arises in the development of the egg cell of higher plants, where only one fertile gamete is produced from MEIOSIS. see EMBRYO SAC.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005