| 释义 | ‖ ulna Anat.|ˈʌlnə|
[L. ulna (hence also It., Pg. ulna), related to Gr. ὠλένη and OE. eln ell1 (cf. elbow n.).]
1. The large inner bone of the fore-arm, extending from the elbow to the wrist.
1541R. Copland Guydon's Quest. Chirurg. G j b, The arme..is deuyded in thre great partyes. One is called vlna, the other lytel arme. Ibid. G i j, Howe many bones are in y⊇ fyrste parte of the great hande that is named vlna or adiutor? 1646Sir T. Browne Pseud. Ep. iv. iv. 184 The other or lower division of the artery descendeth by the ulna. 1693tr. Blancard's Phys. Dict. (ed. 2), Ulna,..the greater Bone, betwixt the Arm and the Wrist, which is jointed upward with the Shoulder. 1726Monro Anat. Bones (1741) 252 At the superior Extremity of the Ulna are two Processes. 1728Chambers Cycl. s.v., The Ulna lies on the inside of the Fore-Arm, reaching from the Elbow to the Wrist. 1803Med. Jrnl. X. 558 The head of this bone was separated from the surrounding parts, as well as its union with the ulna. 1825T. Hook Sayings Ser. ii. Doubts and F. i, Who conceived that some desperate injury had been done to her Ladyship's radius or ulna. 1881Med. Temp. Jrnl. XLVI. 86 There was discharge from incisions both at the back and front of the hand and over the lower part of the ulna.
2. The corresponding bone of the foreleg in quadrupeds, and of the wing in birds.
1831Youatt Horse xiii. 236 The long and front bone, called the radius, is nearly straight... The short and hinder bone is called the ulna. 1839Penny Cycl. XIV. 69/1 In the ruminants generally the ulna is scarcely more than an appendage to the radius. 1879E. P. Wright Anim. Life 57 The fore-arm [in bats] consists of a rudimentary ulna, and a long, curved radius. 1884Coues N. Amer. Birds 107 The enlarged proximal extremity of the ulna is called the olecranon, or ‘head of the elbow’.
3. Palæont. and Ichthyol. (See quots.)
(a)1839G. Roberts Dict. Geol., Ulna.., the bone or plate which, together with the radius, forms the first row, after the humerus, in the front paddles of an ichthyosaurus and plesiosaurus.
(b)a1843Encycl. Metrop. (1845) VII. 303/1 Between the lower edge of the spoke-bone and the upper edge of the ulna or cubit. 1854Owen Orr's Circ. Sci., Org. Nat. I. 175 Of the two flat bones connecting the fin with the coracoid, the upper one is the ‘ulna’. |
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