Dictionary.net

a part of the cell containing DNA and RNA and responsible for growth and reproduction

a small group of indispensable persons or things; "five periodicals make up the core of their publishing program"

any histologically identifiable mass of neural cell bodies in the brain or spinal cord

the positively charged dense center of an atom

a part of the cell containing DNA and RNA and responsible for growth and reproduction

a small group of indispensable persons or things; "five periodicals make up the core of their publishing program"

any histologically identifiable mass of neural cell bodies in the brain or spinal cord

the positively charged dense center of an atom

The body or the head of a comet.

An incipient ovule of soft cellular tissue.

A whole seed, as contained within the seed coats.

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.

The tip, or earliest part, of a univalve or bivalve shell.

The central part around which additional growths are added, as of an operculum.

A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.

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.

The body or the head of a comet.

An incipient ovule of soft cellular tissue.

A whole seed, as contained within the seed coats.

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.

The tip, or earliest part, of a univalve or bivalve shell.

The central part around which additional growths are added, as of an operculum.

A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.

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.

The kernel; the central part about which matter collects; the small, central mass of life-containing substance, from which plants and animals grow.

1. differentiated mass of protoplasm, the excutive center of the functional activity of the cell. It consists, like the cytoplasm, of a network of un fluid substance (caryolymph or nuclear hyalopalsm); along the course of the linin filaments are small masses or granules of a deeply stainable small masses or granules of a deeply stainable basophilic substance (chromatin). The nucleus also contains one or more minute oxyphilic bodies (nucleoli). 2. A mass of gray matter, composed of gagnlion cells, in any part of the brain or spinal cord. 3. Any substance, foreign body, mucus, crystal, etc., around which a urinary or other calculus is formed.

The central mass round which matter gathers: (astr.) the head of a comet:-pl. NUCLEI.

Any central mass; head of a comet.

A center of development; central mass, as of a comet; kernel.

Central part of a body round which the rest accumulates; the body of a comet.

Anything round which matter has accumulated; that which may form the solid foundation or basis, as the nucleus of an army; the solid centre of any nodule or rounded mass; the central fleshy part of an oval; the body of a comet.

A complex spheroidal mass essential to the life of a cell.

See Cytoblast-n. Blastodermatis, Tache embryonnaire-n. Centralis, Corpus dentatum-n. Cicatriculae, Tache embryonnaire-n. Dentatus, Corpus dentatum-. Dentis, Dental pulp-n. Encased, Cytoblast-n. Fimbriatus, Corpus dentatum-n. Furunculi, see Furunculus-n. Germinal, see Molecule-n. Germinativus, see Molecule-n. Olivae, Corpus dentatum-n. Ossificationis, Ossification, point of-n. Rhomboidalis, see Corpus dentatum.

A spheroid body within a cell; the core or center of a cell.

A mass of gray matter in the central nervous system.

The comparatively large body within and usually near the center of any typical cell and forming an integral part of it. The n. is a special agent in cell multiplication, a regulating center for protoplasmic movement, and has a direct influence on digestion.

In chemistry, the elements of a radicle which give the latter its characteristic form and about which all the other elements of the radicle are considered to be grouped; specifically, in the chemistry of the hydrocarbons, the carbon ring apart from the hydrogen atoms and side chains united to it.

Any one of the separate masses of gray matter in the medulla oblongata, the floor of the fourth ventricle, and the aqueduct of Sylvius that represent the gray cornua of the spinal cord in its intracranial portion. [Lat.]

n. [Latin] A kernel ; hence, a central mass or point about which matter is gathered—both literally and figuratively;— the central part of the body of a comet.