| 释义 |
periscopism|ˈpɛrɪskəʊˌpɪz(ə)m|
[f. as periscope n. + -ism.]
The capacity of seeing all round, or over a wide field of vision, without moving the eye; the faculty of periscopic vision.
1877Nature 21 June 151/1 The purpose of the structure is to give periscopism to the eye. 1881Le Conte Sight i. ii. 37 This defect of a homogeneous lens, Dr. Hermann shows, is entirely corrected by the peculiar structure of the crystalline [lens]; therefore this structure confers on the eye the capacity of seeing distinctly over a wide field, without changing the position of the point of sight. This capacity he calls periscopism. Ibid. iii. 76 In the lower animals..in which periscopism is so important. |