Thesaurus: nucleus

Related headwords

Definitions

1. 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.
2. n. The body or the head of a comet.
3. n. An incipient ovule of soft cellular tissue.
4. n. A whole seed, as contained within the seed coats.
5. 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.
6. n. The tip, or earliest part, of a univalve or bivalve shell.
7. n. The central part around which additional growths are added, as of an operculum.
8. n. A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks.
9. n. a part of the cell containing DNA and RNA and responsible for growth and reproduction
10. n. the positively charged dense center of an atom
11. n. a small group of indispensable persons or things
12. n. (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail