| 释义 |
‖ pessulus Anat.|ˈpɛsjʊləs|
[L. pessulus a bolt.]
a. A bolt-like bone: see quot. 1805.
b. In some birds, the cartilaginous or bony bar extending vertically across the lower end of the windpipe, and forming part of the syrinx.
1805A. Carlisle in Phil. Trans. XCV. 204 The stapes in these animals [guinea-pig, marmot] is formed with slender crura, constituting a rounded arch, through which an osseous bolt passes, so as to rivet it to its situation. This bolt I have named pessulus. 1890in Cent. Dict. [in sense b]. 1896Newton Dict. Birds 983 Before the septum has been reduced to the pessulus marking the beginning of the bronchi. |