paranucleusn.

Brit.

/ˌparəˈnjuːklɪəs/, U.S.

/ˌpɛrəˈn(j)ukliəs/

Inflections: Plural paranuclei.

Origin: Formed within English, by derivation. Etymons: para- prefix¹, nucleus n.

Etymology: < para- prefix¹ + nucleus n.

Cell Biology.

A small body situated beside or resembling the nucleus of a cell; a nebenkern.

ΘΚΠ

the world > life > biology > substance > cell > cell organelle or contents > [noun] > nucleus > nucleolus or paranucleus

nucleolus1839

nucleole1864

paranucleus1878

plasmasome1889

1878 E. R. Lankester in tr. C. Gegenbaur Elem. Compar. Anat. Pref. p. viii Conjugation in the Infusoria is attended by a definite breaking-up of the nucleus and so-called nucleolus (paranucleus) of the conjugating individuals.

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 255 The nucleus or endoplast, and paranucleus or endoplastule, sometimes erroneously termed nucleolus.

1928 E. L. Opie in E. V. Cowdry Special Cytol. I. ix. 246 The name ‘nebenkern’ or ‘paranucleus’ has been given to structures situated within the cytoplasm [of the pancreatic acinous cell] and staining like nuclear material.

1954 Sci. Monthly Nov. 282/2 (caption) Elimination of the paranucleus—a small cell eliminated by an enlarged germ cell as the first step before it develops into an infusorigen.

1980 Q. Rev. Biol. 55 155/1 Several authors have used the term ‘pseudogerm’ to refer to cells derived from the paranucleus of the eggs.

1993 Zool. Sci. 10 457/1 Each smaller daughter cell loses its cytoplasm and becomes just a nucleus, known as a paranucleus.

Derivatives

† paranucleate adj. Obsolete rare having a paranucleus or paranuclei.Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. 4281/2 Paranucleate, provided with a paranucleus: as, a paranucleate cell.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	paranucleus
释义	paranucleusn. Brit. /ˌparəˈnjuːklɪəs/, U.S. /ˌpɛrəˈn(j)ukliəs/ Inflections: Plural paranuclei. Origin: Formed within English, by derivation. Etymons: para- prefix¹, nucleus n. Etymology: < para- prefix¹ + nucleus n. Cell Biology. A small body situated beside or resembling the nucleus of a cell; a nebenkern. ΘΚΠ the world > life > biology > substance > cell > cell organelle or contents > [noun] > nucleus > nucleolus or paranucleus nucleolus1839 nucleole1864 paranucleus1878 plasmasome1889 1878 E. R. Lankester in tr. C. Gegenbaur Elem. Compar. Anat. Pref. p. viii Conjugation in the Infusoria is attended by a definite breaking-up of the nucleus and so-called nucleolus (paranucleus) of the conjugating individuals. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 255 The nucleus or endoplast, and paranucleus or endoplastule, sometimes erroneously termed nucleolus. 1928 E. L. Opie in E. V. Cowdry Special Cytol. I. ix. 246 The name ‘nebenkern’ or ‘paranucleus’ has been given to structures situated within the cytoplasm [of the pancreatic acinous cell] and staining like nuclear material. 1954 Sci. Monthly Nov. 282/2 (caption) Elimination of the paranucleus—a small cell eliminated by an enlarged germ cell as the first step before it develops into an infusorigen. 1980 Q. Rev. Biol. 55 155/1 Several authors have used the term ‘pseudogerm’ to refer to cells derived from the paranucleus of the eggs. 1993 Zool. Sci. 10 457/1 Each smaller daughter cell loses its cytoplasm and becomes just a nucleus, known as a paranucleus. Derivatives † paranucleate adj. Obsolete rare having a paranucleus or paranuclei.Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. 4281/2 Paranucleate, provided with a paranucleus: as, a paranucleate cell. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.1878
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