Definition of nucleus

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

Lern More About Nucleus

Tercine :: Tercine (n.) A cellular layer derived from the nucleus of an ovule and surrounding the embryo sac. Cf. Quintine.
Indogen :: Indogen (n.) A complex, nitrogenous radical, C8H5NO, regarded as the essential nucleus of indigo..
Nucellus :: Nucellus (n.) See Nucleus, 3 (a)..
Nucleus :: Nucleus (n.) The tip, or earliest part, of a univalve or bivalve shell..
Nucleus :: Nucleus (n.) A whole seed, as contained within the seed coats..
Nucleiform :: Nucleiform (a.) Formed like a nucleus or kernel.
Trinucleus :: Trinucleus (n.) A genus of Lower Silurian trilobites in which the glabella and cheeks form three rounded elevations on the head.
Karyostenosis :: Karyostenosis (n.) Direct cell division (in which there is first a simple division of the nucleus, without any changes in its structure, followed by division of the protoplasm of the karyostenotic mode of nuclear division..
Mesoplast :: Mesoplast (n.) The nucleus of a cell; mesoblast.
Chalaza :: Chalaza (n.) The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus..
Nucleate :: Nucleate (v. t.) To gather, as about a nucleus or center..
D8gregarin91 :: d8Gregarin91 (n. pl.) An order of Protozoa, allied to the Rhizopoda, and parasitic in other animals, as in the earthworm, lobster, etc. When adult, they have a small, wormlike body inclosing a nucleus, but without external organs; in one of the young stages, they are amoebiform; -- called also Gregarinida, and Gregarinaria..
Entoplastic :: 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..
Bond :: Bond (n.) A unit of chemical attraction; as, oxygen has two bonds of affinity. It is often represented in graphic formulae by a short line or dash. See Diagram of Benzene nucleus, and Valence..
Nucleus :: Nucleus (n.) An incipient ovule of soft cellular tissue.
Gymnocytode :: Gymnocytode (n.) A cytode without either a cell wall or a nucleus.
Nucleolus :: Nucleolus (n.) A small rounded body contained in the nucleus of a cell or a protozoan.
Nucleolated :: Nucleolated (a.) Having a nucleole, or second inner nucleus..
Nucleole :: Nucleole (n.) The nucleus within a nucleus; nucleolus.
Met- :: Met- () That two replacing radicals, in the benzene nucleus, occupy the relative positions of 1 and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 1, or 6 and 2; as, metacresol, etc. See Ortho-, and Para-..
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