| boucle | (noun) a fabric of uneven yarn that has an uneven knobby effect | - |
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| deoxynucleotide | (noun) Any nucleotide that contains a deoxy sugar. | - |
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| endonuclease | (noun) a nuclease that cleaves nucleic acids at interior bonds and so produces fragments of various sizes | - |
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| enucleation | (noun) surgical removal of something without cutting into it | - |
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| exonuclease | (noun) a nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acid | - |
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| mononucleosis | (noun) an acute disease characterized by fever and swollen lymph nodes and an abnormal increase of mononuclear leucocytes or monocytes in the bloodstream; not highly contagious; some believe it can be transmitted by kissing | Synonyms: glandular fever, infectious mononucleosis, kissing disease, mono |
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| nuclease | (noun) general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units | - |
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| nucleole | (noun) a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis | Synonyms: nucleolus |
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| nucleolus | (noun) a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis | Synonyms: nucleole |
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| nucleon | (noun) a constituent (proton or neutron) of an atomic nucleus | - |
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| nucleonics | (noun) the branch of physics that studies the internal structure of atomic nuclei | Synonyms: atomic physics, nuclear physics |
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| nucleoplasm | (noun) the protoplasm that constitutes the nucleus of a cell | Synonyms: karyoplasm |
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| nucleoprotein | (noun) any of several substances found in the nuclei of all living cells; consists of a protein bound to a nucleic acid | - |
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| nucleoside | (noun) a glycoside formed by partial hydrolysis of a nucleic acid | - |
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| nucleosynthesis | (noun) (astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom | - |
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| nucleotide | (noun) a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA) | Synonyms: base |
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| nucleus | (noun) a part of the cell containing DNA and RNA and responsible for growth and reproduction | Synonyms: cell nucleus, karyon |
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| (noun) any histologically identifiable mass of neural cell bodies in the brain or spinal cord | - |
| (noun) the central structure of the lens that is surrounded by the cortex | Synonyms: lens nucleus |
| (noun) a small group of indispensable persons or things | Synonyms: core, core group |
| (noun) the positively charged dense center of an atom | - |
| (noun) (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 | - |
| oligonucleotide | (noun) (biochemistry) a polynucleotide whose molecules contain relatively few nucleotides | Synonyms: oligo |
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| polynucleotide | (noun) (biochemistry) a linear polymer whose molecule is composed of many nucleotide units constituting a section of a nucleic acid molecule | - |
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| pronucleus | (noun) the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote | - |
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| ribonuclease | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonucleinase, RNase |
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| ribonucleinase | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonuclease, RNase |
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