Definition of nucleus

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Nucleus (n.) The tip, or earliest part, of a univalve or bivalve shell..

Lern More About Nucleus

Cytoplasm :: Cytoplasm (n.) The substance of the body of a cell, as distinguished from the karyoplasma, or substance of the nucleus..
Nucellus :: Nucellus (n.) See Nucleus, 3 (a)..
Endoblast :: Endoblast (n.) Entoblast; endoplast. See Nucleus,.
Pyridine :: Pyridine (n.) A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colorless liquid with a peculiar pungent odor. It is the nucleus of a large number of organic substances, among which several vegetable alkaloids, as nicotine and certain of the ptomaines, may be mentioned. See Lutidine..
Pyrrol :: Pyrrol (n.) A nitrogenous base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a colorless liquid, C4H5N, having on odor like that of chloroform. It is the nucleus and origin of a large number of derivatives. So called because it colors a splinter of wood moistened with hydrochloric acid a deep red..
Center :: Center (n.) A principal or important point of concentration; the nucleus around which things are gathered or to which they tend; an object of attention, action, or force; as, a center of attaction..
Pronucleus :: Pronucleus (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.
Nonnucleated :: Nonnucleated (a.) Without a nucleus.
Nucleole :: Nucleole (n.) The nucleus within a nucleus; nucleolus.
Enchylemma :: Enchylemma (n.) The basal substance of the cell nucleus; a hyaline or granular substance, more or less fluid during life, in which the other parts of the nucleus are imbedded..
Quinoline :: Quinoline (n.) A nitrogenous base, C9H7N obtained as a pungent colorless liquid by the distillation of alkaloids, bones, coal tar, etc. It the nucleus of many organic bodies, especially of certain alkaloids and related substances; hence, by extension, any one of the series of alkaloidal bases of which quinoline proper is the type..
Nucleate :: Nucleate (v. t.) To gather, as about a nucleus or center..
Uninucleated :: Uninucleated (a.) Possessed of but a single nucleus; as, a uninucleated cell..
Nucleuses :: Nucleuses (pl. ) of Nucleu.
Nucleolus :: Nucleolus (n.) A little nucleus.
Intranuclear :: Intranuclear (a.) Within the nucleus of a cell; as. the intranuclear network of fibrils, seen in the first stages of karyokinesis..
Phosphoryl :: Phosphoryl (n.) The radical PO, regarded as the typical nucleus of certain compounds..
Bond :: Bond (n.) A unit of chemical attraction; as, oxygen has two bonds of affinity. It is often represented in graphic formulae by a short line or dash. See Diagram of Benzene nucleus, and Valence..
Spermococcus :: Spermococcus (n.) The nucleus of the sperm cell.
Thiophthene :: Thiophthene (n.) A double thiophene nucleus, C6H4S2, analogous to thionaphthene, and the base of a large series of compounds..
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