A more or less spherical and transparent cell, which by a process of multiplication and growth develops into a mass of cells, constituting a new individual like the parent; an egg, spore, germ, or germ cell. See Illust. of Mycropyle.
An ovum is an egg that exists in the ovary of the female. This egg is called the female "gamete" or sex cell. It combines with the male gamete, called a sperm, to form a zygote. This formation process is called "fertilization." See sperm, zygote.
the female germ cell; also a generic term for the female egg or conceptus for about 2 weeks after fertilization prior to the development of the embryo, in which case it is described as the fertilized ovum, the blastomeric ovum, the three-chambered ovum, etc.
An egg or ovum is a female reproductive cell produced by the ovaries. After fertilisation by a sperm (a male reproductive cell), the two cells fuse together to form a single cell, from which an embryo develops.
A specialized sexual cell, commonly called the egg or egg cell, of the female, which corresponds to the sperm in males. It is larger than the sperm because of the food material which is contained in it, and it lacks a tail, instead having a smooth round surface. The ovum was discovered by K.E. von Baer and are produced in the female ovaries. Like the sperm, the number of chromosomes are halved before fertilization in a process called meiosis. Once fertilized, the single cell consisting of half the chromosomes of each of the ovum and the sperm is known as the fertilized ovum, or egg.
the female reproductive cell, also called an egg. When an ovum joins a sperm, an embryo is produced. Pangea: A huge "supercontinent" that encompassed most of the Earth's crust, 300 to 200 million years ago.
The female germ cell, or egg, from the earliest stage (the oogonium in the fetus), through its release from the follicle (ovulation), and (to professional embryologists) through fertilisation up to and sometimes beyond the stage of implantation. Plural: ova. See also: blighted ovum