Search:nucleus -> NUCLEUS
nucleus
n u c l e u s hex:#110;#117;#99;#108;#101;#117;#115;
The Salt of the World?
- 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.
- Nucleus - n. - The body or the head of a comet.
- Nucleus - n. - An incipient ovule of soft cellular tissue.
- Nucleus - n. - A whole seed, as contained within the seed coats.
- 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 - n. - The tip, or earliest part, of a univalve or bivalve shell.
- Nucleus - n. - The central part around which additional growths are added, as of an operculum.
- Nucleus - n. - A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.
- Nucleuses - pl. - of Nucleus
- 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.
- Coma - n. - The envelope of a comet; a nebulous covering, which surrounds the nucleus or body of a comet.
- Phosphonium - n. - The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine.
- Nucleoplasmic - a. - Of or pertaining to nucleoplasm; -- esp. applied to a body formed in the developing ovum from the plasma of the nucleus of the germinal vesicle.
- Nucleate - v. t. - To gather, as about a nucleus or center.
- Nucleole - n. - The nucleus within a nucleus; nucleolus.
- Mesoplast - n. - The nucleus of a cell; mesoblast.
- Chromosome - n. - One of the minute bodies into which the chromatin of the nucleus is resolved during mitotic cell division; the idant of Weismann.
- Nucleoplasm - n. - The matter composing the nucleus of a cell; the protoplasm of the nucleus; karyoplasma.
- Envelop - n. - The nebulous covering of the head or nucleus of a comet; -- called also coma.
- 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.
- Nucleolus - n. - A small rounded body contained in the nucleus of a cell or a protozoan.
- Cytococcus - n. - The nucleus of the cytula or parent cell.
- 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.
- Nucleoidioplasma - n. - Hyaline plasma contained in the nucleus of vegetable cells.
- 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.
- Karyomiton - n. - The reticular network of fine fibers, of which the nucleus of a cell is in part composed; -- in opposition to kytomiton, or the network in the body of the cell.
- Janizary - n. - A soldier of a privileged military class, which formed the nucleus of the Turkish infantry, but was suppressed in 1826.
- Pentamethylene - n. - A hypothetical hydrocarbon, C5H10, metameric with the amylenes, and the nucleus of a large number of derivatives; -- so named because regarded as composed of five methylene residues. Cf. Trimethylene, and Tetramethylene.
- 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.
- Carinaria - n. - A genus of oceanic heteropod Mollusca, having a thin, glassy, bonnet-shaped shell, which covers only the nucleus and gills.
- Diaster - n. - A double star; -- applied to the nucleus of a cell, when, during cell division, the loops of the nuclear network separate into two groups, preparatory to the formation of two daughter nuclei. See Karyokinesis.
- Cytoblast - n. - The nucleus of a cell; the germinal or active spot of a cellule, through or in which cell development takes place.
- 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.
- Para- - - A prefix denoting: (a) Likeness, similarity, or connection, or that the substance resembles, but is distinct from, that to the name of which it is prefixed; as paraldehyde, paraconine, etc.; also, an isomeric modification. (b) Specifically: (Organ. Chem.) That two groups or radicals substituted in the benzene nucleus are opposite, or in the respective positions 1 and 4; 2 and 5; or 3 and 6, as paraxylene; paroxybenzoic acid. Cf. Ortho-, and Meta-. Also used adjectively.