Definition of nucleolus in English:

nucleolus

nounPlural nucleoli ˌnjuːklɪˈəʊləsˌn(j)ukliˈoʊləs

Biology

A small dense spherical structure in the nucleus of a cell during interphase.
Example sentencesExamples
- Some cells had conspicuous nucleoli, and others had cytoplasmic clearing.
- Microscopically, large neoplastic lymphoid cells with prominent nucleoli and frequent mitotic figures occlude small vessel lumina.
- Mature red blood corpuscles are membrane bound and normally devoid of a nucleus, nucleolus, cell organelles, and inclusions.
- The tumor cells were arranged in trabecular and solid patterns with nuclear pleomorphism, prominent nucleoli, and scant basophilic cytoplasm.
- As the cells separated their chromosomes, the nucleolus also appeared to segregate asymmetrically between mother and daughter cells, with the majority in the mother.

Derivatives

nucleolar

adjective ˌnjuːkliːˈəʊlə

Biology

Relating to a small dense spherical structure in the nucleus of a cell during interphase.
a nucleolar protein
Example sentencesExamples
- Active transcription of ribosomal DNA is required in all organisms for both nucleolar formation and ribosome biogenesis.
- In addition to nucleolar prominence, multiple nucleoli and nucleolar margination have also been suggested as diagnostic criteria for prostate cancer.
- The LTR probe uniformly labels the chromosome arms except at the telomeres, nucleolar organizing regions, and centromeres, where the signal is lacking.

Origin

Mid 19th century: from late Latin, diminutive of Latin nucleus 'inner part, kernel' (see nucleus).

Definition of nucleolus in US English:

nucleolus

nounˌn(y)o͞oklēˈōləsˌn(j)ukliˈoʊləs

Biology

A small dense spherical structure in the nucleus of a cell during interphase.
Example sentencesExamples
- Mature red blood corpuscles are membrane bound and normally devoid of a nucleus, nucleolus, cell organelles, and inclusions.
- As the cells separated their chromosomes, the nucleolus also appeared to segregate asymmetrically between mother and daughter cells, with the majority in the mother.
- Microscopically, large neoplastic lymphoid cells with prominent nucleoli and frequent mitotic figures occlude small vessel lumina.
- Some cells had conspicuous nucleoli, and others had cytoplasmic clearing.
- The tumor cells were arranged in trabecular and solid patterns with nuclear pleomorphism, prominent nucleoli, and scant basophilic cytoplasm.

Origin

Mid 19th century: from late Latin, diminutive of Latin nucleus ‘inner part, kernel’ (see nucleus).

单词	nucleolus
释义	Definition of nucleolus in English: nucleolus nounPlural nucleoli ˌnjuːklɪˈəʊləsˌn(j)ukliˈoʊləs Biology A small dense spherical structure in the nucleus of a cell during interphase. Example sentencesExamples Some cells had conspicuous nucleoli, and others had cytoplasmic clearing. Microscopically, large neoplastic lymphoid cells with prominent nucleoli and frequent mitotic figures occlude small vessel lumina. Mature red blood corpuscles are membrane bound and normally devoid of a nucleus, nucleolus, cell organelles, and inclusions. The tumor cells were arranged in trabecular and solid patterns with nuclear pleomorphism, prominent nucleoli, and scant basophilic cytoplasm. As the cells separated their chromosomes, the nucleolus also appeared to segregate asymmetrically between mother and daughter cells, with the majority in the mother. Derivatives nucleolar adjective ˌnjuːkliːˈəʊlə Biology Relating to a small dense spherical structure in the nucleus of a cell during interphase. a nucleolar protein Example sentencesExamples Active transcription of ribosomal DNA is required in all organisms for both nucleolar formation and ribosome biogenesis. In addition to nucleolar prominence, multiple nucleoli and nucleolar margination have also been suggested as diagnostic criteria for prostate cancer. The LTR probe uniformly labels the chromosome arms except at the telomeres, nucleolar organizing regions, and centromeres, where the signal is lacking. Origin Mid 19th century: from late Latin, diminutive of Latin nucleus 'inner part, kernel' (see nucleus). Definition of nucleolus in US English: nucleolus nounˌn(y)o͞oklēˈōləsˌn(j)ukliˈoʊləs Biology A small dense spherical structure in the nucleus of a cell during interphase. Example sentencesExamples Mature red blood corpuscles are membrane bound and normally devoid of a nucleus, nucleolus, cell organelles, and inclusions. As the cells separated their chromosomes, the nucleolus also appeared to segregate asymmetrically between mother and daughter cells, with the majority in the mother. Microscopically, large neoplastic lymphoid cells with prominent nucleoli and frequent mitotic figures occlude small vessel lumina. Some cells had conspicuous nucleoli, and others had cytoplasmic clearing. The tumor cells were arranged in trabecular and solid patterns with nuclear pleomorphism, prominent nucleoli, and scant basophilic cytoplasm. Origin Mid 19th century: from late Latin, diminutive of Latin nucleus ‘inner part, kernel’ (see nucleus).
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