| nucleolar organiser | <molecular biology> Loop of DNA that has multiple copies of rRNA genes. See: nucleolus. (18 Nov 1997) |
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| nucleolar zone | <molecular biology> Loop of DNA that has multiple copies of rRNA genes. See: nucleolus. (18 Nov 1997) |
| nucleolar-nuclear ratio | Ratio of volume of nucleolus to volume of nucleus, usually increased in malignant neoplasms. (05 Mar 2000) |
| nucleoli | Plural of nucleolus. (05 Mar 2000) |
| nucleoliform | Resembling a nucleolus. Synonym: nucleoloid. (05 Mar 2000) |
| nucleolin | <protein> A major nucleolar protein (100 kD) that functions as a shuttle protein between nucleus and cytoplasm and is also found on the cell surface. Nucleolin binds midkine and heparin binding growth associated molecule (HB GAM). Medline 1995 (18 Nov 1997) |
| nucleoloid | Synonym: nucleoliform. Origin: nucleolus + G. Eidos, resemblance (05 Mar 2000) |
| nucleolonema | The irregular network or rows of fine ribonucleoprotein granules or microfilaments forming most of the nucleolus. Origin: nucleolus + G. Nema, thread (05 Mar 2000) |
| nucleolus | <cell biology> A small dense body (sub organelle) within the nucleus of eukaryotic cells, visible by phase contrast and interference microscopy in live cells throughout interphase. Contains RNA and protein and is the site of synthesis of ribosomal RNA. The nucleolus surrounds a region of one or more chromosomes (the nucleolar organiser) in which are repeated copies of the DNA coding for ribosomal RNA. (18 Nov 1997) |
| nucleolus organiser | <molecular biology> Loop of DNA that has multiple copies of rRNA genes. See: nucleolus. (18 Nov 1997) |
| nucleolus organiser region | The chromosome region which is active in nucleolus formation and which functions in the synthesis of ribosomal RNA. (12 Dec 1998) |
| nucleomicrosome | One of the minute particles or granules making up the substance of the cell nucleus. Synonym: nucleomicrosome. Origin: karyo-+ G. Mikros, small, + soma, body (05 Mar 2000) |
| nucleon | <physics> Any particle found in the structure of an atomic nucleus, i.e., neutron or proton. (16 Dec 1997) |
| nucleopetal | 1. Moving in the cell body in a direction toward the nucleus. 2. Moving in a direction toward a nerve nucleus; said of a nervous impulse. Origin: nucleo-+ L. Peto, to seek (05 Mar 2000) |
| Nucleophaga | A microsporan parasite of amoebae which destroys the nucleus of its host. Origin: nucleo-+ G. Phago, to eat (05 Mar 2000) |
Synonyms : Transport Proteins, Nucleocytoplasmic
Synonyms : Nucleolar Organizers, Nucleolus Organizer Regions, Organizer Region, Nucleolus, Organizer Regions, Nucleolus, Organizer, Nucleolar, Organizers, Nucleolar, Region, Nucleolus Organizer, Regions, Nucleolus Organizer
Synonyms : Nuclear Polyhedrosis Viruses, Nucleopolyhedroviruses, Polyhedrosis Virus, Nuclear, Polyhedrosis Viruses, Nuclear, Virus, Nuclear Polyhedrosis, Viruses, Nuclear Polyhedrosis
Synonyms : Nucleoprotein
Synonyms : Deaminases, Nucleoside
| nurse's aide |
nursing aide: someone who assists a nurse in tasks that require little formal training
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| nursery |
a child's room for a baby greenhouse: a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions
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| nucleic acid |
(biochemistry) any of various macromolecules composed of nucleotide chains that are vital constituents of all living cells
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| nursing |
the work of caring for the sick or injured or infirm the profession of a nurse nourishing at the breast
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| nutmeg |
East Indian tree widely cultivated in the tropics for its aromatic seed; source of two spices: nutmeg and mace hard aromatic seed of the nutmeg tree used as spice when grated or ground
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| NU | a space that contains no points |
|---|---|
| NU | a ravine or gully in southern Asia |
| NU | the act of nullifying |
| NU | the states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congress |
| NU | deprived of legal force |
| NU | an official who can invalidate or nullify |
| NU | an advocate of nullification |
| NU | make ineffective by counterbalancing the effect of |
| NU | show to be invalid |
| NU | declare invalid |
| NU | (obstetrics) a woman who has never give birth to a child |
| NU | the state of nonexistence |