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Hasil cari dari kata atau frase: nuclei (0.00993 detik)
Found 2 items, similar to nuclei.
English → English (WordNet)
Definition: nuclei
nucleus
n 1: a part of the cell containing DNA and RNA and responsible
for growth and reproduction [syn:
cell nucleus,
karyon]
2: the positively charged dense center of an atom
3: a small group of indispensable persons or things;
“five
periodicals make up the core of their publishing program”
[syn:
core,
core group]
4: (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
5: any histologically identifiable mass of neural cell bodies
in the brain or spinal cord
[also:
nuclei (pl)]
nuclei
See
nucleus
English → English (gcide)
Definition: Nuclei
Nucleus
\Nu"cle*us\, n.; pl. E.
Nucleuses, L.
Nuclei. [L., a
kernel, dim. fr. nux, nucis, nut. Cf.
Newel post.]
[1913 Webster]
1. 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.
[1913 Webster]
It must contain within itself a nucleus of truth.
--I. Taylor.
[1913 Webster]
2. (Astron.) The body or the head of a comet.
[1913 Webster]
3. (Bot.)
(a) An incipient ovule of soft cellular tissue.
(b) A whole seed, as contained within the seed coats.
[1913 Webster]
4. (Biol.) A body, usually spheroidal, in a eukaryotic cell,
distinguished from the surrounding protoplasm by a
difference in refrangibility and in behavior towards
chemical reagents, which contains the chromosomal genetic
material, including the chromosomal DNA. 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.
[1913 Webster +PJC]
Note: The nucleus is sometimes termed the endoplast or
endoblast, and in the protozoa is supposed to be
concerned in the female part of the reproductive
process. See
Karyokinesis.
[1913 Webster]
5. (Zo["o]l.)
(a) The tip, or earliest part, of a univalve or bivalve
shell.
(b) The central part around which additional growths are
added, as of an operculum.
(c) A visceral mass, containing the stomach and other
organs, in Tunicata and some mollusks.
[1913 Webster]
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