| 释义 |
▪ I. ‖ pons|pɒnz|
The Latin word for ‘bridge’: used in certain phrases.
1. pons asinorum (= bridge of asses): a humorous name for the fifth proposition of the first book of Euclid, from the difficulty which beginners or dull-witted persons find in ‘getting over’ or mastering it. Hence allusively.
1751Smollett Per. Pic. I. xviii. 130 Peregrine..began to read Euclid..but he had scarce advanced beyond the Pons Asinorum, when his ardor abated. 1845Ford Handbk. Spain i. 217/2 This bridge was the pons asinorum of the French, which English never suffered them to cross. 1870Eng. Mech. 4 Feb. 502/1 He knows the operation..to be the pons asinorum of incompetent workmen. 1877Besant & Rice Harp & Cr. xxvii.
2. pons Varolii (= bridge of Varolius or Varoli, an Italian anatomist of the 16th c.), also pons cerebri or cerebelli, and often simply pons (Anat.): a band of nerve-fibres in the brain, just above the medulla oblongata, consisting of transverse fibres connecting the two hemispheres of the cerebellum, and longitudinal fibres connecting the medulla with the cerebrum.
1693tr. Blancard's Phys. Dict. (ed. 2), Pons varolii, certain globous Processes of the Cerebellum. 1704J. Harris Lex. Techn. I, Pons Cerebri,..is a Congeries or Heap of innumerable Filaments divaricated out of the Solider Substance of the Brain. 1831Sir W. Hamilton Metaph. I. App. 420 The average of children under seven, exhibits the Pons, in proportion to the cerebellum, much smaller than in the average of adults. 1875H. Walton Dis. Eye 324 Disease of the pons is a very rare condition.
attrib.1899Allbutt's Syst. Med. VI. 807 In thirty cases of pons tumour..in five only was there defect of hearing.
▪ II. pons
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