OVUM • DICCIONARIO INGLES.COM • Definition of Ovum

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/ˈoʊvəm/ Listen

noun

Ovum n. (pl. L. ova, E. ovums)

(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. 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.

(Arch.) One of the series of egg-shaped ornaments into which the ovolo is often carved.

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Etymology of 'Ovum'

Collaborative International Dictionary of English 0.48

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"Ovum" Quotes from Famous Books

... the female is sometimes caused by a morbid adhesion of the tube to a portion of the ovary. By what power the mouth of the tube is directed toward a particular portion of an ovary, from which the ovum is about to be discharged, remains entirely unknown, as does also the precise nature of the ...

— Searchlights on Health - The Science of Eugenics • B. G. Jefferis and J. L. Nichols

... fully developed at the rate of one in each second, this number would be exhausted in about one month; but since a number of spermatozoa appears to be necessary to produce perfect fertilization, it is quite easy to understand that the number of gemmules introduced into the ovum may be so great that the influence of the male parent may be very marked, even after having been, as regards particular character, apparently dormant for many years." The germinal vesicle of a mammalian ovum being about 1/1000 of ...

— Was Man Created? • Henry A. Mott

... alcohol reaching his brain from a drunken mother. Such traits are congenital, but acquired. Native traits date back to the original constitution of the child, which was fully determined at the time when his individual life began, nine months before birth. The "fertilized ovum", formed by the combination of two cells, one from each of the parents, though microscopic in size and a simple sphere in shape, somehow contains the determiners for all the native or inherited traits ...

— Psychology - A Study Of Mental Life • Robert S. Woodworth

... far as that of size.[24] The female cell is always much larger than the male; where the former is swollen with the reserve food, the spermatozoa may be less than a millionth of its volume. In the human species an ovum is about 3000 times as large as spermatozoa.[25] The male cellule, differentiated to enable it to reach the female, impregnates and becomes fused within her cellule, which, unlike hers, preserves its individuality and continues as the ...

— The Truth About Woman • C. Gasquoine Hartley

... if that hazy contradiction in terms, "personal identity," be once allowed to retreat behind the threshold of the womb, it has eluded us once for all. What is true of one hour before birth is true of two, and so on till we get back to the impregnate ovum, which may fairly claim to have been personally identical with the man of eighty into which it ultimately developed, in spite of the fact that there is no particle of same matter nor sense of continuity between them, ...

— Selections from Previous Works - and Remarks on Romanes' Mental Evolution in Animals • Samuel Butler

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