单词 | nucleoloid |
释义 | nucleoloidadj.n. A. adj. Biology. That resembles a nucleolus. rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1900 W. A. N. Dorland Amer. Illustr. Med. Dict. 447/1 Nucleoloid, resembling a nucleolus. B. n. Botany. A body resembling a nucleolus, found in the cytoplasm of some cells undergoing meiosis. ΘΚΠ the world > life > biology > substance > cell > cell organelle or contents > [noun] > nucleus > nucleus-like body nucleolid1886 nucleoloid1965 1965 Japanese Jrnl. Vet. Res. 13 101 The nucleoloid bodies were morphologically independent of the nucleolus and the chromatin. 1970 Protoplasma 69 188 These bodies contain both RNA and protein and have most of the characteristics of nucleoli; but they are not formed at the nucleolus-organizing regions of chromosomes, and for this reason and because of their presence outside of the nuclei during parts of the division cycles we will refer to them provisionally as nucleoloids. 1977 Philos. Trans. (Royal Soc.) B. 277 332 Most of these [bodies] are released into the cytoplasm, to form cytoplasmic ‘nucleoloids’ known from early accounts of angiosperm male meiosis and well described for Fritillaria by Frankel (1937). 1994 Jrnl. Cell Sci. 107 621 Nucleoloids were found in two clearly distinguishable morphological varieties: one similar in morphology to the nucleolus.., and another surrounded by many ribosome-like particles. This is a new entry (OED Third Edition, December 2003; most recently modified version published online March 2022). < adj.n.1900 |
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