oocystn.

Brit.

/ˈəʊəsɪst/, U.S.

/ˈoʊoʊˌsɪst/

Forms: 1800s– oocyst, 1900s– oöcyst.

Origin: Formed within English, by compounding. Etymons: oo- comb. form, cyst n.

Etymology: < oo- comb. form + cyst n.

1. Mycology and Botany. Originally: †a supposed reproductive cell in certain fungi (obsolete). Later: an oogonium or carpogonium in certain alga and fungi (now rare).

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > reproductive cell

sexual cell1860

oocyst1875

thelyblast1877

sex cell1889

1875 M. C. Cooke Fungi 176 A distinct cell which De Bary terms an oocyst.

1890 Cent. Dict. Oöcyst, in bot., same as oögonium.

1904 Bot. Gaz. 38 244 In the Rhodophyceae..the oocyst (carpogonium) develops a long filamentous receptive outgrowth..with which the sperm fuses.

1914 Bot. Gaz. 58 267 In Sargassum filipendulum, Miss Simons..finds no mitosis after the formation of the oocyst.

†2. Zoology. An ovicell in certain bryozoans. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Polyzoa > [noun] > member of > receptacle for ova

ovicell1856

marsupial capsule1878

ooecium1881

oocyst1882

1882 Ogilvie's Imperial Dict. (new ed.) Oocyst, a chamber appended to the cells of certain of the Polyzoa, which serves as a receptacle for the eggs. Also called Ovicell.

3. Biology. In parasitic protozoa: a resistant structure that forms from a zygote and develops by meiosis into infective sporozoites.

ΚΠ

1900 Jrnl. Royal Microsc. Soc. 337 The macrogametes are fertilised by microgametes, and in each case an oocyst is formed round the conjugates.

1926 Q. Rev. Biol. 1 396/2 The terms applied to these resistant bodies are ‘cyst’..in the case of intestinal amoebae, flagellates and ciliates, and ‘oöcyst’..in the coccidia.

1957 Systematic Zool. 6 4/2 Except in the very rare cases of infection derived from parasites originating from a single oocyst, really pure strains do not exist in nature.

1977 Science 22 Apr. 414/1 The fertilized gamete passes to the outside of the stomach lining, where it develops into an oocyst containing many sporozoites.

2001 National Post (Canada) 4 May a3/3 A person can become infected by..eating raw or undercooked food contaminated with cryptosporidium oocysts.

This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022).

单词	oocyst
释义	oocystn. Brit. /ˈəʊəsɪst/, U.S. /ˈoʊoʊˌsɪst/ Forms: 1800s– oocyst, 1900s– oöcyst. Origin: Formed within English, by compounding. Etymons: oo- comb. form, cyst n. Etymology: < oo- comb. form + cyst n. 1. Mycology and Botany. Originally: †a supposed reproductive cell in certain fungi (obsolete). Later: an oogonium or carpogonium in certain alga and fungi (now rare). ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > reproductive cell sexual cell1860 oocyst1875 thelyblast1877 sex cell1889 1875 M. C. Cooke Fungi 176 A distinct cell which De Bary terms an oocyst. 1890 Cent. Dict. Oöcyst, in bot., same as oögonium. 1904 Bot. Gaz. 38 244 In the Rhodophyceae..the oocyst (carpogonium) develops a long filamentous receptive outgrowth..with which the sperm fuses. 1914 Bot. Gaz. 58 267 In Sargassum filipendulum, Miss Simons..finds no mitosis after the formation of the oocyst. †2. Zoology. An ovicell in certain bryozoans. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Polyzoa > [noun] > member of > receptacle for ova ovicell1856 marsupial capsule1878 ooecium1881 oocyst1882 1882 Ogilvie's Imperial Dict. (new ed.) Oocyst, a chamber appended to the cells of certain of the Polyzoa, which serves as a receptacle for the eggs. Also called Ovicell. 3. Biology. In parasitic protozoa: a resistant structure that forms from a zygote and develops by meiosis into infective sporozoites. ΚΠ 1900 Jrnl. Royal Microsc. Soc. 337 The macrogametes are fertilised by microgametes, and in each case an oocyst is formed round the conjugates. 1926 Q. Rev. Biol. 1 396/2 The terms applied to these resistant bodies are ‘cyst’..in the case of intestinal amoebae, flagellates and ciliates, and ‘oöcyst’..in the coccidia. 1957 Systematic Zool. 6 4/2 Except in the very rare cases of infection derived from parasites originating from a single oocyst, really pure strains do not exist in nature. 1977 Science 22 Apr. 414/1 The fertilized gamete passes to the outside of the stomach lining, where it develops into an oocyst containing many sporozoites. 2001 National Post (Canada) 4 May a3/3 A person can become infected by..eating raw or undercooked food contaminated with cryptosporidium oocysts. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022). < n.1875
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