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单词 pseudonavicella
释义

pseudonavicellan.

Brit. /ˌs(j)uːdəʊnavᵻˈsɛlə/, U.S. /ˈˌsudoʊˌnævəˈsɛlə/
Inflections: Plural pseudonavicellae.
Origin: A borrowing from Latin. Etymon: Latin pseudonavicella.
Etymology: < post-classical Latin pseudonavicella (attributed to C. T. von Siebold (1839), although use in his works has not been traced) < pseudo- pseudo- comb. form + navicella small boat (see nacelle n.): see quot. 1867. Compare slightly later pseudonavicula n.
Zoology. Now rare.
In certain gregarines: an elliptical oocyst (‘spore’) with pointed ends, containing sporozoites.
ΚΠ
1867 J. Hogg Microscope (ed. 6) ii. ii. 367 The Gregarinida..multiply by..dividing into a multitude of minute objects, called pseudo-navicellæ, from their resemblance in shape to the ship-like diatoms (naviculæ).
1877 T. H. Huxley Man. Anat. Invertebrated Animals ii. 94 The embryos of Gregarina gigantea, when they leave their pseudo-navicellæ, are minute masses of protoplasm similar to Protamœbæ.
1913 Philos. Trans. (Royal Soc.) B. 203 42 The zygotes..give rise to the sporoblasts, and each of these divides to form the eight sporozoites of the pseudonavicellæ.
1972 Trans. Amer. Philos. Soc. 62 203/2 Cysts containing pseudonavicella spores, nematode eggs, [etc.]..were found in coagulum discharged through the more anterior dorsal pores.

Derivatives

ˌpseudonaviˈcellar adj. rare Apparently only attested in dictionaries or glossaries.
ΚΠ
1890 Cent. Dict. Pseudonavicellar, pertaining to a pseudonavicella, or having its character, as the spores of Sporozoa.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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n.1867
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