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ovum    音标拼音: ['ovəm]
n. 卵,卵子,卵形装饰

卵,卵子,卵形装饰

ovum
n 1: the female reproductive cell; the female gamete [synonym:
{ovum}, {egg cell}]

Ovum \O"vum\ ([=o]"v[u^]m), n.; pl. L. {Ova} ([=o]"v[.a]), E.
{Ovums} ([=o]"v[u^]mz). [L., an egg. See {Oval}.]
1. (Biol.) 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}.
[1913 Webster]

Note: The ovum is a typical cell, with a cell wall, cell
substance, nucleus, and nucleolus. In man and the
higher animals the cell wall, a vertically striated
membrane, is called the zona pellucida; the cell
contents, the vitellus; the nucleus, the germinal
vesicle; and the nucleolus, the germinal spot. The
diameter of the ripe ovum in man and the domestic
animals varies between 1-200 and 1-120 of an inch.
[1913 Webster]

2. (Arch.) One of the series of egg-shaped ornaments into
which the ovolo is often carved. --Gwilt.
[1913 Webster]


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  • Egg cell - Wikipedia
    The egg cell or ovum (pl : ova) is the female reproductive cell, or gamete, [1] in most anisogamous organisms (organisms that reproduce sexually with a larger, female gamete and a smaller, male one) The term is used when the female gamete is not capable of movement (non- motile)
  • Ovum (Egg Cell): Structure, Function Fertilization
    Overview What is an ovum? An ovum is the name for an egg cell They’re the reproductive cells (or gametes) in females Your ovaries produce ova (the plural name for ovum) and release one ovum at ovulation
  • Egg Cell: Structure, Types, Functions and Oogenesis
    The egg cell, also known as the ovum, is the female reproductive cell The egg cell is released from the ovaries in the female reproductive system The egg cell is the female gamete responsible for reproduction in female organisms This cell is formed through the process of oogenesis
  • Ovum | Structure, Function Fertilization | Britannica
    Ovum, in human physiology, single cell released from either of the female reproductive organs, the ovaries, which is capable of developing into a new organism when fertilized (united) with a sperm cell
  • What Is an Ovum? The Anatomy of the Human Egg Cell
    The ovum, commonly known as the egg cell, represents the female gamete, the specialized reproductive cell necessary for sexual reproduction It carries the female’s genetic contribution, which is half the necessary chromosomes, to the offspring
  • Structure and function of the ovum in the female reproductive system
    The ovum, also known as the egg cell, is the female reproductive cell that plays a critical role in sexual reproduction It is one of the largest cells in the human body, measuring about 0 12 millimeters in diameter, large enough to be seen with the naked eye
  • Ovum | definition of ovum by Medical dictionary
    The female gamete or ovum which, when fertilized by a spermatozoon, can give rise to a new individual The egg is a very large cell, compared with other body cells, and contains only 23 chromosomes, half the normal number (haploid)
  • Ovum | Definition, Function Structure - Lesson | Study. com
    What is an Ovum? The ovum is known as an egg cell and is defined as the cell produced by the female reproductive system when it undergoes meiosis to produce egg cells
  • Ovum - healthencyclopedia. org
    The term “ovum” derives from the Latin word “ovum,” meaning “egg ” It is a non-motile female gamete that fuses with a motile sperm cell during the process of fertilization, resulting in the formation of a zygote, the first stage of a developing individual
  • Ovum - an overview | ScienceDirect Topics
    Ova, or ovum, is defined as a large spherical cell that, when mature, has a diameter of over 100 μm and contains yolk granules, a large nucleus, and is surrounded by a zona pellucida





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