Definition of nucleus

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Nucleus (n.) An incipient ovule of soft cellular tissue.

Lern More About Nucleus

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..
Entoplastic :: Entoplastic (a.) Pertaining to, or composed of, entoplasm; as, the entoplastic products of some Protozoa, or the entoplastic modification of the cell protoplasm, by which a nucleus is produced..
Karyokinesis :: Karyokinesis (n.) The indirect division of cells in which, prior to division of the cell protoplasm, complicated changes take place in the nucleus, attended with movement of the nuclear fibrils; -- opposed to karyostenosis. The nucleus becomes enlarged and convoluted, and finally the threads are separated into two groups which ultimately become disconnected and constitute the daughter nuclei. Called also mitosis. See Cell development, under Cell..
Spermococcus :: Spermococcus (n.) The nucleus of the sperm cell.
Nucleole :: Nucleole (n.) The nucleus within a nucleus; nucleolus.
Valeryl :: Valeryl (n.) The hypothetical radical C5H9O, regarded as the essential nucleus of certain valeric acid derivatives..
Nucleate :: Nucleate (v. t.) To gather, as about a nucleus or center..
Nucleolus :: Nucleolus (n.) A little nucleus.
Nucleus :: Nucleus (n.) 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..
Gymnocyte :: Gymnocyte (n.) A cytode without a proper cell wall, but with a nucleus..
Nucellus :: Nucellus (n.) See Nucleus, 3 (a)..
Phosphonium :: Phosphonium (n.) The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine..
Nucleuses :: Nucleuses (pl. ) of Nucleu.
Nucleated :: Nucleated (a.) Having a nucleus; nucleate; as, nucleated cells..
Sulphophosphate :: Sulphonium (n.) A hypothetical radical, SH3, regarded as the type and nucleus of the sulphines..
Nucleus :: Nucleus (n.) The body or the head of a comet.
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.
Indogen :: Indogen (n.) A complex, nitrogenous radical, C8H5NO, regarded as the essential nucleus of indigo..
Umbra :: Umbra (n.) The central dark portion, or nucleus, of a sun spot..
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..
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