Definition of Nucleu. Meaning of Nucleu. Synonyms of Nucleu

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Definition of Nucleu

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Benzene nucleus
Benzene nucleus, Benzene ring (Chem.), a closed chain or ring, consisting of six carbon atoms, each with one hydrogen atom attached, regarded as the type from which the aromatic compounds are derived. This ring formula is provisionally accepted as representing the probable constitution of the benzene molecule, C6H6, and as the type on which its derivatives are formed.
Nucleus
Nucleus Nu"cle*us, n.; pl. E. Nucleuses, L. Nuclei. [L., a kernel, dim. fr. nux, nucis, nut. Cf. Newel post.] 1. A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or material portion; -- used both literally and figuratively. It must contain within itself a nucleus of truth. --I. Taylor. 2. (Astron.) The body or the head of a comet. 3. (Bot.) (a) An incipient ovule of soft cellular tissue. (b) A whole seed, as contained within the seed coats. 4. (Biol.) A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division.
Nucleuses
Nucleus Nu"cle*us, n.; pl. E. Nucleuses, L. Nuclei. [L., a kernel, dim. fr. nux, nucis, nut. Cf. Newel post.] 1. A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or material portion; -- used both literally and figuratively. It must contain within itself a nucleus of truth. --I. Taylor. 2. (Astron.) The body or the head of a comet. 3. (Bot.) (a) An incipient ovule of soft cellular tissue. (b) A whole seed, as contained within the seed coats. 4. (Biol.) A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division.
Paranucleus
Paranucleus Par`a*nu"cle*us, n. [Pref. para- + nucleus.] (Biol.) Some as Nucleolus.
Parent nucleus
Parent Par"ent, n. [L. parens, -entis; akin to parere to bring forth; cf. Gr. ? to give, beget: cf. F. parent. Cf. Part.] 1. One who begets, or brings forth, offspring; a father or a mother. Children, obey your parents in the Lord. --Eph. vi. 1. 2. That which produces; cause; source; author; begetter; as, idleness is the parent of vice. Regular industry is the parent of sobriety. --Channing. Parent cell. (Biol.) See Mother cell, under Mother, also Cytula. Parent nucleus (Biol.), a nucleus which, in cell division, divides, and gives rise to two or more daughter nuclei. See Karyokinesis, and Cell division, under Division.
Pronucleus
Pronucleus Pro*nu"cle*us, n.; pl. Pronuclei (-[imac]). [NL. See Pro-, and Nucleus.] (Biol.) 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 spermatozo["o]n 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.
Segmentation nucleus
Segmentation Seg`men*ta"tion, n. The act or process of dividing into segments; specifically (Biol.), a self-division into segments as a result of growth; cell cleavage; cell multiplication; endogenous cell formation. Segmentation cavity (Biol.), the cavity formed by the arrangement of the cells in segmentation or cleavage of the ovum; the cavity of the blastosphere. In the gastrula stage, the segmentation cavity in which the mesoblast is formed lies between the entoblast and ectoblast. See Illust. of Invagination. Segmentation nucleus (Biol.), the body formed by fusion of the male and female pronucleus in an impregnated ovum. See the Note under Pronucleus. Segmentation of the ovum, or Egg cleavage (Biol.), the process by which the embryos of all the higher plants and animals are derived from the germ cell. In the simplest case, that of small ova destitute of food yolk, the ovum or egg divides into two similar halves or segments (blastomeres), each of these again divides into two, and so on, thus giving rise to a mass of cells (mulberry mass, or morula), all equal and similar, from the growth and development of which the future animal is to be formed. This constitutes regular segmentation. Quite frequently, however, the equality and regularity of cleavage is interfered with by the presence of food yolk, from which results unequal segmentation. See Holoblastic, Meroblastic, Alecithal, Centrolecithal, Ectolecithal, and Ovum. Segmentation sphere (Biol.), the blastosphere, or morula. See Morula.
Trinucleus
Trinucleus Tri*nu"cle*us, n. [Pref. tri- + nucleus.] (Paleon.) A genus of Lower Silurian trilobites in which the glabella and cheeks form three rounded elevations on the head.

Meaning of Nucleu from wikipedia

- (2007), Em Dias P****ados: Figuras, Instituições e Acontecimentos da História Faialense (in Portuguese), Horta (Azores), Portugal: Nucleu Cultural da Horta...
- P****ados: Figuras, Instituições e Acontecimentos da História Faialense. Horta: Nucleu Cultural da Horta. ISBN 978-989-95033-3-5. Boléo, Maria Luísa V. de Paiva...
- Nucleu Etnográfico dos Cedros (Ethnographic Museum of Cedros); once the second factory used by Constantino Amaral and D. Teresa in their dairy business...
- (2007), Em Dias P****ados: Figuras, Instituições e Acontecimentos da História Faialense (in Portuguese), Horta (Azores), Portugal: Nucleu Cultural da Horta...
- 17 January 2016. Retrieved April 6, 2023. Lista propunerilor de Programe-Nucleu de Cercetare-Dezvoltare propuse pentru finanțare în perioada 2023-2026 research...
- História Faialense [In Days P****ed: Figures, Institutions and Events in the Faialense History] (in Portuguese). Horta, Azores: Nucleu Cultural da Horta....
- Acontecimentos da História Faialense (in Portuguese). Horta (Azores), Portugal: Nucleu Cultural da Horta. José de Almeida de Ávila (in Portuguese), Horta (Azores)...
- Instituições e Acontecimentos da História Faialense (in Portuguese). Horta: Nucleu Cultural da Horta. Farol dos Capelinhos (in Portuguese), Horta (Azores)...
- Instituições e Acontecimentos da História Faialense (in Portuguese). Horta: Nucleu Cultural da Horta. António José de Ávila, Lisbon, Portugal: O Globo, 6 November...
- (2007). Em Dias P****ados: Figuras, Instituições e Acontecimentos da História Faialense (in Portuguese). Horta (Azores), Portugal: Nucleu Cultural da Horta....