| 单词 |
paranucleus |
| 释义 |
paranucleus Biol.|pærəˈnjuːkliːəs|
Pl. -i.
[f. para-1 1 + nucleus.]
A small subsidiary nucleus, of which there may be one or more, in certain Protozoa.
1878Bell Gegenbaur's Comp. Anat. 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. 1888Rolleston & Jackson Anim. Life 255 The nucleus or endoplast, and paranucleus or endoplastule, sometimes erroneously termed nucleolus.
Hence paraˈnuclear a., pertaining to or of the nature of a paranucleus; paraˈnucleate a., having a paranucleus. So also paranuˈcleolus, a body extruded from the nucleus of the mother-cell of pollen-grains or spores just before division.
1885Lankester in Encycl. Brit. XIX. 864/1 It does not appear to be established that there is any transference of nuclear or paranuclear matter from one individual to the other in the form of solid formed particles. 1887A. B. Macullum in Q. Jrnl. Microsc. Sc. Mar. 447. |
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