English-Thai Dictionary
pronucleus
N นิวเคลียส น้อย ที่ รวมกัน เป็น นิวเคลียส ของ Zygote
Webster's 1913 Dictionary
PRONUCLEUS
Pro *nu "cle *us, n.; pl. Pronuclei (-i ). Etym: [NL. See Pro-, and Nucleus. ] (Biol.)
Defn: One of the two bodies or nuclei (called male and female pronuclei ) which unite to form the first segmentation nucleus of an impregnated ovum.
Note: In the maturing of the ovum preparatory to impregnation, a part of the germinal vesicle (see Polar body, under Polar ) becomes converted into a number of small vesicles, which aggregate themselves into a single clear nucleus. which travels towards the center of the egg and is called the female pronucleus. In impregnation, the spermatozoön which enters the egg soon loses its tail, while the head forms a nucleus, called the male pronucleus, which gradually travels towards the female pronucleus and eventually fuses with it, forming the first segmentation nucleus.
New American Oxford Dictionary
pronucleus
pro nu cle us |prōˈn (y )o͞oklēəs proʊˈnjukliəs | ▶noun ( pl. pronuclei |-klēˌī | ) Biology either of a pair of gametic nuclei, in the stage following meiosis but before their fusion leads to the formation of the nucleus of the zygote. DERIVATIVES pro nu cle ar |-klēər |adjective
Oxford Dictionary
pronucleus
pronucleus |prəʊˈnjuːklɪəs | ▶noun ( pl. pronuclei ) Biology either of a pair of gametic nuclei, in the stage following meiosis but before their fusion leads to the formation of the nucleus of the zygote. DERIVATIVES pronuclear adjective
The Wordsmith Dictionary