| 单词 |
atresia |
| 释义 |
‖ atresia Path.|əˈtriːʃ(ɪ)ə|
[mod.L., f. Gr. ἄτρητος not perforated, τρῆσις perforation.]
1. Occlusion or closure of a natural channel of the body.
1807in Morris & Kendrick Edin. Med. Dict. 1866T. Peacock Malform. Heart 60 Atresia of the orifice..of the pulmonary artery.
2. Disappearance by degeneration, as of the follicles in the mammalian ovary.
1903Jrnl. R. Microsc. Soc. Aug. 485 In the ferret, ovulation does not occur in the absence of coition, without which the follicles undergo atresia. 1962New Scientist 7 June 506/3 The others [sc. egg cells] are eliminated from the ovary at different stages of development by a process of spontaneous degeneration known as atresia.
Hence aˈtresic, aˈtretic adjs., pertaining to or resulting from atresia; imperforate.
1897Lippincott's Med. Dict. 101/1 Atresic, characterised by atresia. 1903Nature 20 Aug. 384/2 Other atresic follicles are reduced to fibrous tissue or remain cystic. 1903Jrnl. R. Microsc. Soc. Aug. 485 The atretic follicle differs from the developing corpus luteum in the absence of any discharge to the exterior. 1962New Scientist 7 June 506/3 No distinction was made between normal and atretic egg cells. |
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