ramus
/ˈreɪməs/noun
(pl. rami /-maɪ/)
1
- Anatomy an arm or branch of a bone, in particular those of the ischium and pubes or of the jawbone【剖】（尤指坐骨和耻骨或颌骨的）支, 分支。
1.1
- a major branch of a nerve（神经的）主要分支。
2
- Zoology a structure in an invertebrate that has the form of a projecting arm, typically one of two or more that are conjoined or adjacent【动】（无脊椎动物的）附肢分支。
2.1
- a barb of a feather羽支。
词源
mid 17th cent.: from Latin, literally 'branch'.