| 单词 |
excyst |
| 释义 |
excyst, v. Biol. and Med.|ɛkˈsɪst|
[Back-formation from *excystation n.]
intr. To undergo excystment; to emerge or be released from a cyst.
1913Proc. R. Soc. B. LXXXVI. 434 Traces of the iodine in potassium iodide solution..gave exactly the same tone of blue as in the areas where Colpoda had excysted. 1933Physiol. Zoöl. VI. 127 This ciliate does not excyst from its permanent cysts spontaneously, but must be stimulated to excyst by some very definite change in the environment. 1965Jrnl. Protozool. XII. 416/2 The predator..excysts readily in the presence of bacteria upon which it is unable to feed. 1975Jrnl. Parasitol. LXI. 657 Upon ingestion by the vertebrate host, metacercariae excyst and migrate into the lungs where they mature.
So exˈcysted ppl. a., that has excysted; exˈcysting ppl. a.
1911Proc. R. Soc. B. LXXXIV. 178 Recently excysted Col[poda] cucullus are easily recognisable by their clear protoplasm, their readily distinguishable nuclear area, and by their absence of food vacuoles. 1913Ibid. B. LXXXVI. 433 The antiseptics, toluene, chloroform, etc., kill the excysting organisms but not the enzyme which it is secreting. 1935Archiv für Protistenkunde LXXXIV. 148 Excysted didinia, like the exconjugants, also die, unless fed. 1977Jrnl. Protozool. XXIV. 23/1 A small excysted cell grows rapidly and new somatic and oral kinetosomes proliferate within the functioning oral apparatus at the apical region of the body. |
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