Definition of Pronucleus

1. Noun. The nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote.

Generic synonyms: Cell Nucleus, Karyon, Nucleus

Definition of Pronucleus

1. n. One of the two bodies or nuclei (called male and female pronuclei) which unite to form the first segmentation nucleus of an impregnated ovum.

Definition of Pronucleus

1. Noun. Either of the two haploid nuclei (of a sperm and ovum) that fuse during fertilization ¹

¹ Source: wiktionary.com

Definition of Pronucleus

1. [n -CLEI or -CLEUSES]

Pronucleus Pictures

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Lexicographical Neighbors of Pronucleus

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Literary usage of Pronucleus

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Treatise on Comparative Embryology by Francis Maitland Balfour (1885)
"When, in Asterias, the impregnation is effected about an hour after the egg is laid, and previously to the formation of the polar cells, the male pronucleus ..."

2. A Treatise on Comparative Embryology by Francis Maitland Balfour (1880)
"Close to it Hertwig has shewn that another nucleus is to be found, the female pronucleus, and that eventually the two join together. ..."

3. A Treatise on Comparative Embryology by Francis Maitland Balfour (1880)
"Close to it Hertwig has shewn that another nucleus is to be found, the female pronucleus, and that eventually the two join together. ..."

4. The Development of the Frog's Egg: An Introduction to Experimental Embryology by Thomas Hunt Morgan (1897)
"It is sometimes said that the female pronucleus attracts the male pronucleus, but the approach of the two may be due to changes in the protoplasm ; for the ..."

5. Human Embryology by Charles Sedgwick Minot (1892)
"pronucleus, while the tail still remains distinct even after segmentation has been initiated, Fig. 44. The disappearance of the tail has been recorded by ..."

6. Textbook of human physiology by Leonard Landois, William Stirling (1889)
"Thereafter, the male and female pronucleus unite, undergoing amoeboid movements at the ... The female pronucleus receives the male pronucleus in a little ..."

7. Journal of Morphology by Wistar Institute of Anatomy and Biology (1889)
"19 the female pronucleus is about one-third the distance from the cephalic ... It is no further from the dorsal surface than the female pronucleus in Fig. ..."

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