Definition of nucleus

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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..

Lern More About Nucleus

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..
Multispiral :: Multispiral (a.) Having numerous spiral coils round a center or nucleus; -- said of the opercula of certain shells.
Nucleus :: Nucleus (n.) 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..
Nucleus :: Nucleus (n.) A whole seed, as contained within the seed coats..
Endoplast :: Endoplast (n.) See Nucleus.
Phosphonium :: Phosphonium (n.) The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine..
Monera :: Monera (n. pl.) The lowest division of rhizopods, including those which resemble the amoebas, but are destitute of a nucleus..
Nucleus :: Nucleus (n.) An incipient ovule of soft cellular tissue.
Mesoblast :: Mesoblast (n.) The cell nucleus; mesoplast.
Nucleus :: Nucleus (n.) The tip, or earliest part, of a univalve or bivalve shell..
Met- :: Met- () That two replacing radicals, in the benzene nucleus, occupy the relative positions of 1 and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 1, or 6 and 2; as, metacresol, etc. See Ortho-, and Para-..
Nuclear :: Nuclear (a.) Of or pertaining to a nucleus; as, the nuclear spindle (see Illust. of Karyokinesis) or the nuclear fibrils of a cell; the nuclear part of a comet, etc..
Indogen :: Indogen (n.) A complex, nitrogenous radical, C8H5NO, regarded as the essential nucleus of indigo..
Nucleuses :: Nucleuses (pl. ) of Nucleu.
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.
Karyoplasma :: Karyoplasma (n.) The protoplasmic substance of the nucleus of a cell: nucleoplasm; -- in opposition to kytoplasma, the protoplasm of the cell..
Indogenide :: Indogenide (n.) Any one of the derivatives of indogen, which contain that group as a nucleus..
Cytococcus :: Cytococcus (n.) The nucleus of the cytula or parent cell.
Chalaza :: Chalaza (n.) The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus..
Thionaphthene :: Thionaphthene (n.) A double benzene and thiophene nucleus, C8H6S, analogous to naphthalene, and like it the base of a large series of derivatives..
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