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Nucleus :: Nucleus (n.) The central part around which additional growths are added, as of an operculum..

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.

Diaster :: 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..

Nucleus :: Nucleus (n.) A whole seed, as contained within the seed coats..

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..

Multispiral :: Multispiral (a.) Having numerous spiral coils round a center or nucleus; -- said of the opercula of certain shells.

Carinaria :: Carinaria (n.) A genus of oceanic heteropod Mollusca, having a thin, glassy, bonnet-shaped shell, which covers only the nucleus and gills..

Karyoplasma :: Karyoplasma (n.) The protoplasmic substance of the nucleus of a cell: nucleoplasm; -- in opposition to kytoplasma, the protoplasm of the cell..

Nucleolated :: Nucleolated (a.) Having a nucleole, or second inner nucleus..

Nucleolus :: Nucleolus (n.) A small rounded body contained in the nucleus of a cell or a protozoan.

Mesoplast :: Mesoplast (n.) The nucleus of a cell; mesoblast.

Endoplastica :: Endoplastica (n. pl.) A group of Rhizopoda having a distinct nucleus, as the am/ba..

Nucleus :: Nucleus (n.) The body or the head of a comet.

Janizary :: "Janizary (n.) A soldier of a privileged military class, which formed the nucleus of the Turkish infantry, but was suppressed in 1826..

Blastide :: Blastide (n.) A small, clear space in the segments of the ovum, the precursor of the nucleus..

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..

Umbra :: Umbra (n.) The central dark portion, or nucleus, of a sun spot..

Perinuclear :: Perinuclear (a.) Of or pertaining to a nucleus; situated around a nucleus; as, the perinuclear protoplasm..

Cytoblast :: Cytoblast (n.) The nucleus of a cell; the germinal or active spot of a cellule, through or in which cell development takes place..

Cytococcus :: Cytococcus (n.) The nucleus of the cytula or parent cell.

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